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An Allison 1000 transmission will not bolt up to a Chevrolet 454 you begin engine. The Allison transmission is much larger than the Chevrolet engine housing can handle.
Yes it will with no problems.
Yes, it is the same bolt pattern.
Any Chevy transmission will bolt to any Chevy engine.
Yes it will bolt right up.
As long as the TH350 is from a Chevy....yes.
Yes if the bell housings match up to the engine bolt pattern.
Any Chevy transmission will bolt to any Chevy motor. At least RWD. 1955 to current. A 454 should really have a 400 transmission but a 350 will work. Depending on what you are putting it in there may be an issue with the driveshaft length and the yoke that goes into the trans.
yes they are the same a 454 will bolt up
No it will not work. It will bolt up but 454 is externally balanced and 305 is internally balanced.
Yes, they have the same bolt pattern.
i believe that any 454 bbc head will bolt up to any 454 Block. But some heads are beter then others. I would find out the specs of the head before installing.