There is no need for a adapter plate, The 350 trans. bolt pattern is the same as a 400 trans bolt pattern. All Chevy transmission are interchangeable up to the year 2000
If it's a 350 from a Chevy, yes.
YES, That is no problem, it will bolt right up.
Answeryes... the bell housings are the same.. Think about it. a 350 is a 350... thehy did not change the bolt pattern or the size of the block, to accomodate the transmission. or cast an entirely different 350. a th 400 is just a better transmission. don. As an aside, The Chevy bolt pattern is different from the Buick, Olds, Pontiac, Cadillac bolt pattern. For this reason, the 400 would have to have come from a Chevy. There are 400's with the BOP pattern, and they would not fit a Chevy without a fairly expensive adapter.
Yes, as long as the transmission has the Chevy bolt pattern.
Sorry but it will not I have tried. The 400 is too wide and it won't bolt up correctly when the transmission is installed.
It will if the trans has Chevy bolt pattern.
Yes, if they were built with the standard Chevy bolt pattern.
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.
yes, same bolt pattern. Chances are the 455 buick had a turbo hydromnatic 400 transmission, hopefully that is what your 350 had. If not, crossmember, driveshaft and linkage will all have to be modified or changed.
It has the same bolt pattern and it will bolt up but you will need the correct flexplate.
Yes of course. All Chevy engines are interchangible with transmissions. For example, you can have a 305, 307, 327, 350, 400 with a turbo 350, turbo 400, or 700r4 big block are also the same