Chevy Crankshaft #

Hemiparts · 04-06-2011, 04:53 PM

Working on our SS 302 project engine I have a crankshaft that I believe is correct the pn is 6764 any info ???? I thank you guys for your help as always.

okieracer · 04-06-2011, 05:32 PM

AERA shows 6764 to be 67-69 302 G.M.

Walt Reynolds · 04-06-2011, 08:49 PM

67 Camaros had a small journal crank. 68-69 had large journal.

Hemiparts · 04-06-2011, 10:18 PM

thanks guys !@!@ it is a small journal so it must be a 67, pretty good score for something found in a pile of parts behind Chris3's shop.

Will this crank hold up in 302 4 speed Super Stocker ????

FED 387 · 04-06-2011, 10:22 PM

ya building a 67 or 68-69 engine???

Hemiparts · 04-06-2011, 10:56 PM

Quote:

Originally Posted by fed 387

ya building a 67 or 68-69 engine???

68

chris3racing · 04-06-2011, 11:04 PM

The engine was in a stack of 283 small block, the block casting number is for a 67 283 cu. in. engines. For matter of record by shop and storage area is known as "Mike's Small Block Orphanage" with last count of 35 engines. I noticed the end of the crankshaft and knew by the circular end with the "v" notch.

Put the engine in the shop and removed the crankshaft. The casting number is 6764. Four reference books for small block chevrolet casting numbers list this crankshaft for a 1967 302 "Z-28." The crankshaft was installed in the high performance 283 block and created the 1967 Camaro"Z-28", 320 cu. in. under General Motors Work Order #19621-34, dated October 11, 1966 and read "remove engine, send to motor room, install engine #196231-high performance 283", engine weight dressout was 572 pounds. Only 602, 1967 "Z-28", 302 cubic inch camaros were built, the remainder of the 1,000 production required to meet racing requirements were 350 cubic inch.

Car #1 went to Aero Chevrolet in Alexandria, Virginia and was Johnny Moore's entry in the Daytona 24-hour Continental. Car #2, #3 and #4 went to Yenko Chevrolet in Canonsburg, Pa. 1967 Camaro "Z-28" 302 cu. in. #9, #10 and #11 went to Nickey Chevrolet in Chicago. "Z-28" #21 was delivered to stunt driver Joie Chitwood in Tampa, Fla.

I have been amazed, after making a couple of phone calls, the information I have received concerning this engine and will post some photos of the disassembly later in the week. Also I think it has the original "Z-28" 302 camshaft. Think maybe Stock class 1967 302 cubic inch Camaro? I won't post what the horsepower rating was by some magazines in 1967 but Chevrolet listed it as 290 at 5800 rpm.

Hemipart didn't mean to steal your post concerning the crankshaft.

DrHP · 04-10-2011, 03:27 PM

It probably doesn't make any difference, but the Z28 302 was derived from using a four inch bore 327 block and a three inch stroke 283 crank. I am a former national record holder with a '69 Z28 from back in the late 70's, know this engine inside and out. I feel that if you are building a competitive Super Stock version, you should go for a quality crank, because you will end up reving this combo into the stratosphere to get really good power, also select your trans gearing properly. The stock crank (I remember the 6764 as being a steel 283 crank) is a 1053 steel part, fairly stiff with the short stroke, but and not very tough compared to a modern non-twist 4340.

My two cents, Dennis Baccus

04-06-2011, 10:22 PM	#5
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,410 Likes: 507 Liked 329 Times in 177 Posts	Re: Chevy Crankshaft # ya building a 67 or 68-69 engine???

04-06-2011, 11:04 PM	#7
chris3racing Senior Member Join Date: Mar 2008 Posts: 528 Likes: 0 Liked 0 Times in 0 Posts	Re: Chevy Crankshaft # The engine was in a stack of 283 small block, the block casting number is for a 67 283 cu. in. engines. For matter of record by shop and storage area is known as "Mike's Small Block Orphanage" with last count of 35 engines. I noticed the end of the crankshaft and knew by the circular end with the "v" notch. Put the engine in the shop and removed the crankshaft. The casting number is 6764. Four reference books for small block chevrolet casting numbers list this crankshaft for a 1967 302 "Z-28." The crankshaft was installed in the high performance 283 block and created the 1967 Camaro"Z-28", 320 cu. in. under General Motors Work Order #19621-34, dated October 11, 1966 and read "remove engine, send to motor room, install engine #196231-high performance 283", engine weight dressout was 572 pounds. Only 602, 1967 "Z-28", 302 cubic inch camaros were built, the remainder of the 1,000 production required to meet racing requirements were 350 cubic inch. Car #1 went to Aero Chevrolet in Alexandria, Virginia and was Johnny Moore's entry in the Daytona 24-hour Continental. Car #2, #3 and #4 went to Yenko Chevrolet in Canonsburg, Pa. 1967 Camaro "Z-28" 302 cu. in. #9, #10 and #11 went to Nickey Chevrolet in Chicago. "Z-28" #21 was delivered to stunt driver Joie Chitwood in Tampa, Fla. I have been amazed, after making a couple of phone calls, the information I have received concerning this engine and will post some photos of the disassembly later in the week. Also I think it has the original "Z-28" 302 camshaft. Think maybe Stock class 1967 302 cubic inch Camaro? I won't post what the horsepower rating was by some magazines in 1967 but Chevrolet listed it as 290 at 5800 rpm. Hemipart didn't mean to steal your post concerning the crankshaft.

04-10-2011, 03:27 PM	#8
DrHP Junior Member Join Date: Feb 2011 Location: Walla Walla WA Posts: 8 Likes: 0 Liked 0 Times in 0 Posts	Re: Chevy Crankshaft # It probably doesn't make any difference, but the Z28 302 was derived from using a four inch bore 327 block and a three inch stroke 283 crank. I am a former national record holder with a '69 Z28 from back in the late 70's, know this engine inside and out. I feel that if you are building a competitive Super Stock version, you should go for a quality crank, because you will end up reving this combo into the stratosphere to get really good power, also select your trans gearing properly. The stock crank (I remember the 6764 as being a steel 283 crank) is a 1053 steel part, fairly stiff with the short stroke, but and not very tough compared to a modern non-twist 4340. My two cents, Dennis Baccus

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04-06-2011, 04:53 PM	#1
Hemiparts Member Join Date: Mar 2008 Location: Raleigh, N.C Posts: 212 Likes: 0 Liked 0 Times in 0 Posts	Chevy Crankshaft # Working on our SS 302 project engine I have a crankshaft that I believe is correct the pn is 6764 any info ???? I thank you guys for your help as always.

04-06-2011, 05:32 PM	#2
okieracer Junior Member Join Date: Jul 2002 Location: Durant Posts: 8 Likes: 0 Liked 0 Times in 0 Posts	Re: Chevy Crankshaft # AERA shows 6764 to be 67-69 302 G.M.

04-06-2011, 08:49 PM	#3
Walt Reynolds Junior Member Join Date: Mar 2009 Location: Lucas (Dallas) Texas Posts: 40 Likes: 0 Liked 0 Times in 0 Posts	Re: Chevy Crankshaft # 67 Camaros had a small journal crank. 68-69 had large journal.

04-06-2011, 10:18 PM	#4
Hemiparts Member Join Date: Mar 2008 Location: Raleigh, N.C Posts: 212 Likes: 0 Liked 0 Times in 0 Posts	Re: Chevy Crankshaft # thanks guys !@!@ it is a small journal so it must be a 67, pretty good score for something found in a pile of parts behind Chris3's shop. Will this crank hold up in 302 4 speed Super Stocker ???? Last edited by Hemiparts; 04-06-2011 at 10:22 PM.