as of now just worried about the short block build up

as for crank

for instance I am looking at Eagle cranks

here is what it says

.092 Radii on rod, main journals, rear seal, and snout for increased strength.

rated for 500hp
stroke 3.480"
bob weight 1870
rod length 5.7

then yoru choice is:
2 piece rear seal internal balance
OR
1 piece rear seal external balance

will that crank work for what I want to do.. and which one do u recomend for the seal and balance

Dave