74 Dart 318 to 383 Engine Swap Help

I bought my first car not too long ago, a 74 dart with a 318/904, i'm picking up a 383/727 later today for a steal and was wondering what i would need to do to make the swap work. Also, what'd be the major difference in power after the swap. I was going to just put a four barrel carb/intake and headers and exhaust for more power in the 318. But now with the 383 im assuming it shouldn't be too hard to get the power i wanted to get with the 318.
you're gonna need the following:

Bigger Radiator
Schmaucher Mount kit
Disc Brakes
a minimum of 1.03 torsion bars.
at least a 8.25 rear axle, preferably a 8.75 or dana 60
Better shocks.

as for power, 383 has way more than a 318. it'll be easy to push 350-400 hp flywheel with simple mods like headers/intake/carb