Coming back with a build! Need advice!

Are you planning to use the 3.75 stroke crank with those pistons? You need a piston for the RB stroke and 4.28 bore if that's the case. KB162s will pop out the bores by way past .100". I also do not believe that cam will make your numbers with ported Stealths on a 438" engine.

If it was me I'd just get the 'Source B wedge stroker kit. It's not the best parts, but you will be at a better place to start from and you can always add the porting and larger cam later. Machining that 440 crank to fit in the 383 block is costly - you also have to make the counterweights smaller. The source crank is drop in, and stronger.