273 CDP Block Question

Bub Whitaker · 05-23-2012, 07:00 PM

Ok you Dodge boys...
Is the 64 to 67 273 block drilled in the lifter passages to support hydraulic lifters. I see where it went to hyd in 68

House of Darts · 05-23-2012, 10:30 PM

Not in my '65 block.

Jeff Lee · 05-24-2012, 11:51 AM

Something about the 1964 (only) 273 block. Deck angles are different? Intake manifold won't interchange due to this. Check with somebody more knowledgeable if you have a 1964 block.

Steve Hayward · 05-24-2012, 12:37 PM

Quote:

Originally Posted by Bub Whitaker

Ok you Dodge boys...
Is the 64 to 67 273 block drilled in the lifter passages to support hydraulic lifters. I see where it went to hyd in 68

You have the large paassages running along the lifter bank and the one passage feeding it from the mains........... As long as they are the same sizes as the later hyd blocks your good to go.................. I'm betting they are.........

Rory McNeil · 05-24-2012, 02:11 PM

Quote:

Originally Posted by Jeff Lee

Something about the 1964 (only) 273 block. Deck angles are different? Intake manifold won't interchange due to this. Check with somebody more knowledgeable if you have a 1964 block.

Back in the early 70`s I owned a 65 Valiant Signet, with a 235HP 273 4 speed. A buddy sold me an Edelbrock D4B intake, and I remember having to oval out the mounting bolt holes to make the bolts go in. I think the angle of the intake bolts were different in 64 and 65, maybe somebody more familiar will chime in. As for hydraulic lifters , mine had solids, and I had thought that all 273s did, even the 2 barrels. I could be wrong.

Paul Wong · 05-24-2012, 02:40 PM

The pre 1966 273 heads have 5/16 bolt holes for the intake. After 1966 they went to 3/8 like all other small block mopars. That is why you had to oblong the holes in the early manifold you were trying to use.

Myron Piatek · 05-24-2012, 03:06 PM

I've never worked on a 273, but I've seen several forum discussions that mention a different bolt angle as well on the earliest years. (64-65-(66?)) i.e: Edelbrock D4B = early, Edelbrock LD4B = later.

Phillip marvetz · 05-24-2012, 05:00 PM

Can you post a picture of the lifter bores?

Bub Whitaker · 05-24-2012, 05:30 PM

Quote:

Originally Posted by Phillip marvetz

Can you post a picture of the lifter bores?

Don't have a block in the shop, Comp Cams asked me, I didn't know so I'm asking the forum...
All you others focus, this question is about oil supply to the lifter bores... nothing else

Phillip marvetz · 05-24-2012, 06:58 PM

Well if you are wanting to run a hydraulic cam in a early 273 you could drill into the oil galley if the block does not already feed the lifters, Mopar sells a jig to do this for the R series blocks. Since you don't have the block in front of you it's hard to say though.
I would have assumed they all come machined to oil the lifters but since I've never taken one apart that's just a assumption,lol. I usually just steal the rockers and pushrod's off of them and send the rest to scrap.

05-23-2012, 07:00 PM	#1
Bub Whitaker Member Join Date: Feb 2005 Location: Dayton, MD Posts: 222 Likes: 0 Liked 1 Time in 1 Post	273 CDP Block Question Ok you Dodge boys... Is the 64 to 67 273 block drilled in the lifter passages to support hydraulic lifters. I see where it went to hyd in 68 __________________ Bub Whitaker

05-23-2012, 10:30 PM	#2
House of Darts Member Join Date: Mar 2007 Posts: 346 Likes: 19 Liked 20 Times in 15 Posts	Re: 273 CDP Block Question Not in my '65 block.

05-24-2012, 11:51 AM	#3
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: 273 CDP Block Question Something about the 1964 (only) 273 block. Deck angles are different? Intake manifold won't interchange due to this. Check with somebody more knowledgeable if you have a 1964 block. __________________ Jeff Lee 7494 D/S '70 AMX

05-24-2012, 02:40 PM	#6
Paul Wong Member Join Date: Jan 2003 Location: Las Vegas Posts: 384 Likes: 101 Liked 419 Times in 85 Posts	Re: 273 CDP Block Question The pre 1966 273 heads have 5/16 bolt holes for the intake. After 1966 they went to 3/8 like all other small block mopars. That is why you had to oblong the holes in the early manifold you were trying to use.

05-24-2012, 03:06 PM	#7
Myron Piatek VIP Member Join Date: Nov 2001 Location: Florida Posts: 1,542 Likes: 34 Liked 138 Times in 51 Posts	Re: 273 CDP Block Question I've never worked on a 273, but I've seen several forum discussions that mention a different bolt angle as well on the earliest years. (64-65-(66?)) i.e: Edelbrock D4B = early, Edelbrock LD4B = later.

05-24-2012, 05:00 PM	#8
Phillip marvetz Senior Member Join Date: Oct 2008 Location: Lynden ,WA Posts: 820 Likes: 0 Liked 3 Times in 3 Posts	Re: 273 CDP Block Question Can you post a picture of the lifter bores? __________________ 2009 V/SA Record Holder

05-24-2012, 06:58 PM	#10
Phillip marvetz Senior Member Join Date: Oct 2008 Location: Lynden ,WA Posts: 820 Likes: 0 Liked 3 Times in 3 Posts	Re: 273 CDP Block Question Well if you are wanting to run a hydraulic cam in a early 273 you could drill into the oil galley if the block does not already feed the lifters, Mopar sells a jig to do this for the R series blocks. Since you don't have the block in front of you it's hard to say though. I would have assumed they all come machined to oil the lifters but since I've never taken one apart that's just a assumption,lol. I usually just steal the rockers and pushrod's off of them and send the rest to scrap. __________________ 2009 V/SA Record Holder