Need Help

Ok I need all you tranny goo-rue to help. Ok, question is I have a 1951 331 extend bell block and I want to use my 2 speed powerglide for my tranny. If I cut some of the bell of the tranny and make a adapter plate for the Hemi will it work, if so how do I measure to know how much to cut of the tranny. And what about the input shaft? Maybe I'm way off base, need help with the project....thanks