However if all you wanna do is run low 10's and stop there and not have to have all the extra Tech stuff, that can be done with a mild 10>10.5:1 620hp 512 that will run 10.0's with just a solid cam and probably with either of the heads you mention above.
All true....... However, many(most?) people don't seem to get 100% of the potential performance out of their motors, and it can be time consuming and costly to figure out what the problem is.
On the other hand, if you're starting from scratch, it's not really that much more money at all to build a 700-725hp motor than it is a 625hp one, and then the "car" doesn't have to be as good for you to be able to achieve your goals.
TTi makes headers that would work for either a B or RB build, for either std or raised ex port heads...... So that part is easy.
EZ-1, EZ295, SR295, TF270....... They will all get the job done.
Flat tops and 75cc heads puts you in the 11.5cr range, which should be plenty.
