360 motor flex plate

i want to put a 360 in a 65 barracuda in front of a 904 push button that i believe is the original. i believe i have a flex plate from years back that i had connecting a 360 to a 727 from a 64 A100 van. how do i check the tranny and motor to determine what will work?

thanks
You can bolt in the 360 with the following notes.....You'll need a bushing for the end of the crank for the small button converter (I think Mancini has them); A custom 360 converter for your trans or the B&M flex plate for your existing converter; motor mount brackets that will fit the 360 block and your K-member (Schumacher or modify your 273 ones); a 360 car oil pan, and a custom exhaust system. Most everything else should transfer over from your 273. If it's a true '65 model, it would not have a push button transmission. '65's were still cable shift but either on the column or the floor.
Thanks, Mark