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05-29-2012, 10:28 PM | #1 |
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Join Date: Oct 2011
Location: Oxford,Pa
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GMC V-6 casting number help
I just pulled the V-6 from my 67 GMC and was hoping to gather a little info on it but I cannot find any casting info online. Hoping someone here can help.
Casting number is 2476575. Above that appears to be CWC4 but it is tough to read. Anyone...?? |
05-29-2012, 10:46 PM | #2 |
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Re: GMC V-6 casting number help
ttt for u
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A husband can be right...or...A husband can be happy. 67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk. 1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder! |
05-29-2012, 10:57 PM | #3 |
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Re: GMC V-6 casting number help
Hey 70,
Not sure what you mean by the "ttt" but I see it on here often. What does it mean? I am sure it is so obvious that I will feel stupid once you tell me. Thanks, Erik |
05-29-2012, 11:01 PM | #4 |
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Re: GMC V-6 casting number help
Hey Erik,
Not sure what the number means, but this was on my 401M that I got. I have asked on the 6066 site, but they are stumped as well.
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MusicMan70 1961 GMC Suburban |
05-29-2012, 11:15 PM | #5 | |
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Re: GMC V-6 casting number help
Quote:
Maybe run the numbers on the 60-66 site. They should know over there. Eric
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05-29-2012, 11:22 PM | #6 |
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Re: GMC V-6 casting number help
Thanks for the info Eric.
I am really suprised there is not much info on these motors online. If I run the casting number from my small block 350 there are pages on them as far as build dates, what they were in originally, etc... |
06-01-2012, 03:08 AM | #7 |
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Re: GMC V-6 casting number help
For starters, 'CWC' stands for Campbell, Wyant, and Cannon Foundry:
http://www.cwctextron.com/history.html You will see that cast in many engine blocks to this day. CWC is a major suppier of castings to all the major auto manufacturers. I have even seen the CWC mark on Mack diesel blocks. I can't ID your block from that casting number. The finished part numbers of GMC V-6 blocks used in pickups are 2482478 for the 305E, and 2484685 for the 351E. Take a look in front of the right (passenger side) cylinder head and just below the head there should be some numbers stamped into the block. The numbers will start with the engine model number (305E or 351E) and follow with a date code. 'E' basically ment light duty engine in '67. That's really all you need to know. Aside from the different sizes (305, 351, 401, 478), there was not a lot of different versions of the GMC V-6's, like there was for Chevy Small Blocks.
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1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. |
09-04-2012, 12:56 PM | #8 |
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Location: Quebec, Canada
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Re: GMC V-6 casting number help
Hi Erikh09
Im new to this forum and sorry for my english im speaking french. I found your casting number while looking for mine, in the AERA Engine Builders Association Cylinder Head and Block Manual April 2006 PDF. It seem to be a 305 ci. GM 5.0L 305ci 1960-75 Intake Hgt: 2.5160-2.5460" (63.906-64.668 MM) Exhaust Hgt: 2.5160-2.5460" (63.906-64.668 MM) Casting Numbers: Head #:2336645, 2367198, 2367298, 2367299, 2436645, 2475795, 2487297 Block #: 2367238, 2367298, 2367417, 2457325, 2476565, 2476575 Notes: GMC TRUCK, V6 HEAVY DUTY GAS If you want it, just PM me your email, the pdf is like 5 mb. |
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