i have a 56 bel air dropping in a semi built 350 engine. what i have now for transmission is a 2 speed powerglide. old owner of teh 350 engine said he blew out 2 th350 and he recomends me to get a th400 or a 700r. what will i have to change to put thi s motor in.i assumed i cant used my 2 speed powerglide cuss this motor will blow it. also if i use the 400 i have to change drive shaft?