It would never hold together.....
It depends on the transmission and any modifications to the engine.
You will need to remove the transmission.
yes
There are adapters for everything.
The small block chevy turns in a clockwise rotation.
Yes it will, it is the same bolt pattern.
No.
Yes it will, It should already have a small block Chevy in it , if it's a V8.
Dextron.
No.
I'm not sure why you'd want to put a small block Chevy in that Pontiac. But some things to keep in mind....most of the engine wiring is on the opposite side. You'll need to change engine mounts on the frame and you'll also have to make sure to get a Chevy transmission as the B.O.P.C trannys won't bolt to a Chevy.
One can purchase a Chevrolet small-block engine from the original manufacturer or your local car dealer. One can also purchase a small-block engine from eBay.