1950 V8 swap

[Agrass1992]

So I've decided to go with a crate 350 engine and I'm in the process of picking out all my extras like the intake and carb but by no means is this going to be a 400HP monster Im expecting 290ish HP and 350 ft/lbs torque. My next step is deciding which transmission to go with I've heard a lot of good things regarding the Muncie 4 speeds but my concern is with any of these transmissions will any of them line up with the original hole in the floor pan or am I going to have to do some major/minor modifications there. Any info/past experience is appreciated.