Originally Posted by ponchopower69
Let's hear about some proven 6-700ish HP combos.... I am building a 77 Astre and looking for good 9's for now to see if I can make the car put that much to use. So I was wondering what some 6-700HP motor combos look like and what it took to get it there. It don't matter if it's NA or power adder comber either.
I love the 4.125-4.150" bore with a 4" stroke combination. It works well for Windsors/Clevelands and it works well for Pontiacs that I've done with that combination.
I did a 4.150" bore 400 block with a Scat steel 4" crankshaft, mild hydraulic roller, 10.5:1, with a set of Kauffman high port heads and a Performer RPM intake, that made 600 hp @ 6000 rpm.
Good lookin piece too, if I do say so myself.