Yes it will
Yes it will bolt right up.
As long as the TH350 is from a Chevy....yes.
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.
For what I read tonight, as I am doing my Big Block, the 4 bolt main is 110LBS
yes
Yes, it is the same bolt pattern.
Any Chevy transmission will bolt to any Chevy engine.
Yes it will with no problems.
It can be either a 2 or 4 bolt
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.
Chevrolet passenger cars in 1973. 454 with 250 Horse Power and Turbo 400 transmission. 2 and 4 bolt mains were possible.
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.