451 Budget builds?

Not a 451 but we've just turned down a 440 crank to go in my brother's 383.
At 60 over it'll be a 438.
We used 440 length aftermarket H beams with small pins (picked them up new 2nd hand dirt cheap) and bought a set of Diamond pistons to suit.
Haven't got far with the engine but it's got stealths,TTI,performer rpm,750vac,Comp 272 hydraulic.
It's to go into a 65 Fury so heavy car.
Brother is hoping for 450hp...I reckon 400.