trans adapter??

so, i'm building a 52 chevy pickup for my wife. got a hot little 235 with dual carbs, split exhaust, and a lumpy little cam. problem is she WILL NOT drive a standard and refuses to learn.....
my question is, where the hell do i find an adapter plate to go from this 235 to like a th350??

 

Might post over in the general discussion area to make sure you get a good response to your question.