318 build problems & new direction

No worries yellow rose.

So I have my 318 short (72) that is running with 85K gentle miles, and I just purchased a 69 340 short from a 69 Cuda S. It included block, caps, steel crank and rods.

I am wondering what do I borrow from the 318. It has a cast crank that probably needs nothing, as the steel crank is rusted and needs to be reworked. Do I care that I am only building to 400hp if I just use the cast crank?

Also, should I bother with factory rods, or will Eagle I rods (~$250) be a much wiser choice to attach my KB hypers to?

Also, how do I know if crank is forged?

Any other build advice?

I am overboring to 4.08", using my comp 268 H cam, 308 bowl ported heads, DP intake with Fitech injection and Dakota logs feeding dual exhaust 2.5". Any guess as to my power?