Parts I purchased today for my 383 budget build any suggestions

the KB 400s will net you anywhere between 9:1 depending on where they are in relation to the deck height what gasket you use and how the heads cc out. Just for argument sake:

88cc chambers, which is typical for open chamber heads
020 below the deck
.040x4.40 gasket (typical)
~ 9.2:1

same heads/gaskets, 010 below the deck
~9.4:1

disclaimer: None of those numbers are exact; if you want exact numbers, you'll need to break out the burette and measure with the pistons in the block. There's a thread in the how to section from krazykuda on how to do it.

I'm kinda curious how the heads measure out...