Transmission bolt patern question

[Jeeves]

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]

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]

Ok awesome

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