You can't, They don't make a after market bellhousing to do that.
You will have to change the transmission to.
yes
No, the engine is not the transmission bellhousing. The bellhousing is a separate piece all together.
yes yes
powerglide is a tranny
Yes. It may be bigger but it will bolt on.
If it's a 496 Chevy, yes.
No
there are six bolts in the bellhousing on a v8 Chevrolet transmission
The 350 has NO electrical parts on it or in it what so ever ( NONE )
Yes it will bolt directly to it and the only reason i know is because i have a 1993 sonoma with a 4.3L motor and i had to drop the transmission and it was a 350 turbo tranny. And there is nothing different that you need to do to it
Absolutely. Chevy bolted them to the 350 straight from the factory. The 700 R4 has the exact same bellhousing bolt pattern as the 350 and 400 turbo does.
find a 350, build mounts to mount the engine, find a tranny for it, and install. only.. if the engine fits in the first place, and if you need to ask, you should probably find someone that has done this swap (if its possible) or has experience with 350's find a 350, build mounts to mount the engine, find a tranny for it, and install. only.. if the engine fits in the first place, and if you need to ask, you should probably find someone that has done this swap (if its possible) or has experience with 350's