6066 (1960-1966) GMC Truck Club - Transmission bolt patern question

6066 (1960-1966) GMC Truck Club (https://6066gmcclub.com/index.php)

- GMC V6 and V12 Engines (https://6066gmcclub.com/forumdisplay.php?f=9)

- - Transmission bolt patern question (https://6066gmcclub.com/showthread.php?t=49978)

Jeeves

April 28th, 2017 03:55 PM

Transmission bolt patern question

Do all the different blocks have the same bolt patern or are the ones out of 1.5 ton and up different from the smaller trucks?

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bigblockv6

April 29th, 2017 12:59 AM

Re: Transmission bolt patern question

If you're talking about the engine bolt pattern on the 60 degree family of GMC V6 truck engines then all 305,351,379, 401, 432 & 478 as well as the 637 V8 and 702 V12 have the same bolt pattern. There definitely several different bellhousings for different applications but they will all bolt up to any of these engines.:ok:

Jeeves

April 30th, 2017 05:43 PM

Re: Transmission bolt patern question

Ok awesome

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