10-12 hour days

IMO, there isnt much better in terms of dollar/power than RPMs. Indys may be too large, I'm not that familiar with the small block stuff. I do know there are a lot of very powerful cars running the heads that start $1000 less. But whther a set of cleaned up Indys will be better..I cant tell you honestly. A 410 streeet car (predominantly) doesnt need much more than the Edelbrocks.