1965 Impala BBC Stocker Update - Page 8

Jerry Terry · 08-01-2015, 10:47 AM

Dwight what does the 327-300 hp look like, I know when I raced stock back in the seventies it was rated to high,but it had the good heads, we ran the 1968 327 250 smog,small valve motor in Msa 68 chevelle wagon and Nsa belair sedan and Osa in a impala convertible and psa in a wagon

Greg Reimer 7376 · 08-01-2015, 02:20 PM

You're putting together a great project car,looks like you are having fun doing it.The '65 327/250 horse engine differs from its predecessors(62-64) by way of having 461 heads as opposed to the 896/520 casting. That gives you a big improvement in valve size on the intake, port size, and maybe a little bit of compression.There's five horsepower there and then some.The 300 horse 327 also had the 459 intake and the AFB carb, but the short block and cam are the same.The 459 intake is OK to use on the 250 horse with the Rochester 4 jet,and those improvements can make a big difference.The 65 engine has an advantage with the heads, the 68 engine with the intake and carb,but gives a lot back with the low compression head, around 9 to 1 compression,The cam is a little different in 68 as well.I do believe,however, the big block is the better way to go,especially since you have a proven motor already.Keep up the good work, and keep up the photos!

Dwight Southerland · 08-02-2015, 09:22 AM

Greg pretty well covered the makeup of the '65 model 327-250. To put some more perspective on the small block choices in a '65 full size Chevrolet:
1. 283/195 @170 Not totally bad considering you can use a 3-speed automatic now. You would have to want to chase this one because it is not favorable enough to be built cheaply. Obviously, it would be better if it were rated at 162 like in the Chevy II.
283/220 @ 217 auto Not totally bad either. This combo has been beat on a lot which means that to build a fast one will be expensive. Ask Wade Owens.
327/250 @ 251 This would be better at 245 like all the other applications in 1965. The parts are identical to the 327/300 except the carb. This combination has lots of development history.
327/300 @ 265 Like stated above, this engine is identical to the 250 hp version except carburetor. The 4GC will flow ~485-500 cfm while the AFB on the 300 version flows ~585-600 cfm. Is that extra airflow worth 14hp? I don't know. It has been my feeling that the GM AFB combinations need to be looked at again. The MoPar guys have made great strides in the development of the AFB's potential and that should cross directly to the GM engines. Also, you could make a case for using the aftermarket versions - Carter and Edelbrock - that have the same throttle and venturi sizes and pick up an additional 25-40 cfm.

All the 327 high compression engines from 65 thru 68 are basically the same except for carburetors, so you can do some comparisons there and make your own decisions. The 68 327/250 is different because it uses smaller port heads and less compression, but it has a Qjet and that is what attracts attention. Over the years as the combos have been sorted out the small heads have shown to be enough of a disadvantage that the power rating is down in comparison to the others. It's all about airflow, isn't it?

None of these combinations are a decide advantage over the selection of the 396/325 and none offer a cheaper solution. "You pays your money and you takes your choice", as Huckleberry Finn said.

impstocker · 08-03-2015, 10:30 PM

Want to thank everybody for the input about the Small Block combos for the 1965 Impala. I will be running my 396/325 engine, this is the same motor that pushed my 68 Impala to 11.70's with a stick at 4095 lbs in I/S I never really sorted out the clutch and 60 foot times, spun the tires a lot. I hope with the TH350 , which I have with a 2.75 1st gear, i can run a consistent lower 60 ft times, my best if I remember were 1.59- 1.65 with the stick.

Lots of real fast I/SA cars in Div. 1 Most SBC Camaros, Novas Chevelles. 11.40 - 11.65 the norm. Yikes! With my MPH I had though the 396 is making power... we shall see. But, more work to do/

Will Lamprecht

impstocker · 11-02-2015, 07:40 AM

Just a quick update. I compound buff paintjob, installed most trim, just waiting for missing pieces. Finishing up brakes, elrctrical ect. Carpet coming in next week to finish off interior. Will be installing a BBC block to mock up for tranny install. Making car ready just to install motor probaly in early next year by Feb.

Will Lamprecht Div 1 65 Impala 396/325 I/SA in progress

OLD INJUN · 11-09-2015, 10:24 AM

Quote:

Originally Posted by impstocker

just a quick update. I compound buff paintjob, installed most trim, just waiting for missing pieces. Finishing up brakes, elrctrical ect. Carpet coming in next week to finish off interior. Will be installing a bbc block to mock up for tranny install. Making car ready just to install motor probaly in early next year by feb.

Will lamprecht div 1 65 impala 396/325 i/sa in progress

how does that new drivers door latch work?

impstocker · 11-09-2015, 11:58 AM

Latch works allright for a nock off Mexican/Chinese piece. This ain't no 100% original restoration show car, just look good from the stands i guess!

Will Lamprecht I/SA 65 Impala in progress

OLD INJUN · 11-12-2015, 04:41 PM

will I m the one that sold you the door latch. take a look at what I just finished there is 5 pages so far http://www.yenko.net/ubbthreads/ubbt...opics/622826/1

tj310 · 11-13-2015, 10:18 AM

Will I love it , keep going strong . OLDINJUN blue is 'a beauty eh '---Trevor

impstocker · 11-14-2015, 10:55 AM

Old Injun, I was wondering how you knew about the new door latch!

Yes, very nice restoration on that Biscayne.

Quite honestly, my 68 Impala was an original 427/425 car with the # matching motor. I would do the car show thing for years, but really got boring. I always wanted a stocker so I built my 68 Impala into a race car, that car sold and and restored to OEM.

I had that car 30+ years but ended up in the hands of somebody who builds/collect 68 Fullsize BBC cars! He does not care about drag racing and has no interest in that part of the history of the car. One of the main reasons I am building a 65 Impala I was able to get all the racing parts back including motor, rear end ect..

I scratch my paint job on the 65 already but hey, it's a race car!

My ideal Street car would be a V8 Vega! Also wanted one.

Will

08-01-2015, 10:47 AM	#71
Jerry Terry Senior Member Join Date: Jul 2003 Location: Cincinnati Posts: 650 Likes: 6,068 Liked 450 Times in 133 Posts	Re: 1965 Impala BBC Stocker Update Dwight what does the 327-300 hp look like, I know when I raced stock back in the seventies it was rated to high,but it had the good heads, we ran the 1968 327 250 smog,small valve motor in Msa 68 chevelle wagon and Nsa belair sedan and Osa in a impala convertible and psa in a wagon Last edited by Jerry Terry; 08-01-2015 at 10:50 AM. Reason: adding some

08-01-2015, 02:20 PM	#72
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,132 Likes: 172 Liked 698 Times in 216 Posts	Re: 1965 Impala BBC Stocker Update You're putting together a great project car,looks like you are having fun doing it.The '65 327/250 horse engine differs from its predecessors(62-64) by way of having 461 heads as opposed to the 896/520 casting. That gives you a big improvement in valve size on the intake, port size, and maybe a little bit of compression.There's five horsepower there and then some.The 300 horse 327 also had the 459 intake and the AFB carb, but the short block and cam are the same.The 459 intake is OK to use on the 250 horse with the Rochester 4 jet,and those improvements can make a big difference.The 65 engine has an advantage with the heads, the 68 engine with the intake and carb,but gives a lot back with the low compression head, around 9 to 1 compression,The cam is a little different in 68 as well.I do believe,however, the big block is the better way to go,especially since you have a proven motor already.Keep up the good work, and keep up the photos!

08-02-2015, 09:22 AM	#73
Dwight Southerland VIP Member Join Date: Dec 2001 Location: Arkansas - In the middle of everything. Posts: 1,999 Likes: 63 Liked 772 Times in 192 Posts	Re: 1965 Impala BBC Stocker Update Greg pretty well covered the makeup of the '65 model 327-250. To put some more perspective on the small block choices in a '65 full size Chevrolet: 1. 283/195 @170 Not totally bad considering you can use a 3-speed automatic now. You would have to want to chase this one because it is not favorable enough to be built cheaply. Obviously, it would be better if it were rated at 162 like in the Chevy II. 283/220 @ 217 auto Not totally bad either. This combo has been beat on a lot which means that to build a fast one will be expensive. Ask Wade Owens. 327/250 @ 251 This would be better at 245 like all the other applications in 1965. The parts are identical to the 327/300 except the carb. This combination has lots of development history. 327/300 @ 265 Like stated above, this engine is identical to the 250 hp version except carburetor. The 4GC will flow ~485-500 cfm while the AFB on the 300 version flows ~585-600 cfm. Is that extra airflow worth 14hp? I don't know. It has been my feeling that the GM AFB combinations need to be looked at again. The MoPar guys have made great strides in the development of the AFB's potential and that should cross directly to the GM engines. Also, you could make a case for using the aftermarket versions - Carter and Edelbrock - that have the same throttle and venturi sizes and pick up an additional 25-40 cfm. All the 327 high compression engines from 65 thru 68 are basically the same except for carburetors, so you can do some comparisons there and make your own decisions. The 68 327/250 is different because it uses smaller port heads and less compression, but it has a Qjet and that is what attracts attention. Over the years as the combos have been sorted out the small heads have shown to be enough of a disadvantage that the power rating is down in comparison to the others. It's all about airflow, isn't it? None of these combinations are a decide advantage over the selection of the 396/325 and none offer a cheaper solution. "You pays your money and you takes your choice", as Huckleberry Finn said. __________________

08-03-2015, 10:30 PM	#74
impstocker Member Join Date: Dec 2008 Location: Wingdale, NY Posts: 302 Likes: 27 Liked 53 Times in 16 Posts	Re: 1965 Impala BBC Stocker Update Want to thank everybody for the input about the Small Block combos for the 1965 Impala. I will be running my 396/325 engine, this is the same motor that pushed my 68 Impala to 11.70's with a stick at 4095 lbs in I/S I never really sorted out the clutch and 60 foot times, spun the tires a lot. I hope with the TH350 , which I have with a 2.75 1st gear, i can run a consistent lower 60 ft times, my best if I remember were 1.59- 1.65 with the stick. Lots of real fast I/SA cars in Div. 1 Most SBC Camaros, Novas Chevelles. 11.40 - 11.65 the norm. Yikes! With my MPH I had though the 396 is making power... we shall see. But, more work to do/ Will Lamprecht

11-02-2015, 07:40 AM	#75
impstocker Member Join Date: Dec 2008 Location: Wingdale, NY Posts: 302 Likes: 27 Liked 53 Times in 16 Posts	Re: 1965 Impala BBC Stocker Update Just a quick update. I compound buff paintjob, installed most trim, just waiting for missing pieces. Finishing up brakes, elrctrical ect. Carpet coming in next week to finish off interior. Will be installing a BBC block to mock up for tranny install. Making car ready just to install motor probaly in early next year by Feb. Will Lamprecht Div 1 65 Impala 396/325 I/SA in progress Attached Thumbnails

11-09-2015, 11:58 AM	#77
impstocker Member Join Date: Dec 2008 Location: Wingdale, NY Posts: 302 Likes: 27 Liked 53 Times in 16 Posts	Re: 1965 Impala BBC Stocker Update Latch works allright for a nock off Mexican/Chinese piece. This ain't no 100% original restoration show car, just look good from the stands i guess! Will Lamprecht I/SA 65 Impala in progress

11-12-2015, 04:41 PM	#78
OLD INJUN Member Join Date: Sep 2006 Posts: 160 Likes: 0 Liked 1 Time in 1 Post	Re: 1965 Impala BBC Stocker Update will I m the one that sold you the door latch. take a look at what I just finished there is 5 pages so far http://www.yenko.net/ubbthreads/ubbt...opics/622826/1

11-13-2015, 10:18 AM	#79
tj310 Member Join Date: Sep 2009 Location: Dresden On. Canada Posts: 460 Likes: 0 Liked 0 Times in 0 Posts	Re: 1965 Impala BBC Stocker Update Will I love it , keep going strong . OLDINJUN blue is 'a beauty eh '---Trevor

11-14-2015, 10:55 AM	#80
impstocker Member Join Date: Dec 2008 Location: Wingdale, NY Posts: 302 Likes: 27 Liked 53 Times in 16 Posts	Re: 1965 Impala BBC Stocker Update Old Injun, I was wondering how you knew about the new door latch! Yes, very nice restoration on that Biscayne. Quite honestly, my 68 Impala was an original 427/425 car with the # matching motor. I would do the car show thing for years, but really got boring. I always wanted a stocker so I built my 68 Impala into a race car, that car sold and and restored to OEM. I had that car 30+ years but ended up in the hands of somebody who builds/collect 68 Fullsize BBC cars! He does not care about drag racing and has no interest in that part of the history of the car. One of the main reasons I am building a 65 Impala I was able to get all the racing parts back including motor, rear end ect.. I scratch my paint job on the 65 already but hey, it's a race car! My ideal Street car would be a V8 Vega! Also wanted one. Will