I am going to run an Index class with 7.60 ET and 7.50 break out. I have B1 originals with titan. 2.30" and T&D 5/8" shaft rockers. With Predator heads I could probably skip spray, or use very little.
Most fast cars here, have B1īs orig/ MC or 572-13 heads, and the step up to Predators with new headers, pistons and what you can sell your old stuff is pretty big, for me anyway.
I tried to answer the question, from my perspective.
