318>383 swap ('74 Valiant)

I'm planning engine swap 318->383 for my '74 Valiant (original V8 car), my current combo is 318cid, TF904, 8 1/4, 2 1/4 duals with stock exh.manifolds, car has front disk brakes. Is there something I should be aware of in this swap project: is it basically drop-in (they never are I know...)?

Car is for street only.