I dont know anything about building a NHRA class car....but I know it takes big $$$$.
Not familiar with "R3" ....I assume that is a special aftermarket block?
Its just that the way the OP said it, it seemed like a stock 89/90 block with some work....thanks for clearing that up.
Still, seems like its very expensive to go fast no matter what ya start out with...LOL
I dont think the original poster has chimed in since........ ???