Quote: Just some comments after reading this thread that may be helpful. Not trying to be a "know it all", just sharing what I have experienced.
We have a 3700# car, NA, 430ci going 10.0 in the heat and should nick 9's shortly.
if you don't mind, what is the gear and converter combo your running?
The rear gear in the 10.0 car is 3.06 with a 28" tire. Converter flashes around 4000. Car 1.40 60's and is trapping at 135.
To use the Apache heads you will need pistons with valve relief, valve covers and pushrods.
As far as running these on a 5.7 it depends on your power goals. When we had the quickest 5.7 in the MSHS series we were running the Apaches with good results.
I could've swore Andy said the 5.7 needed a bore notch? I wanted to run a set of Apaches but I took a stock 6.1 valve and set it in my Manley piston valve notch, it is barely adequate for even the 2.08 valve.
