2020 Small Block Penalty Box Race Sign Up

GreyWizard said
Humm, I dunno about some of the index adjustments. If I read this correctly, If I put a set of Speedmaster heads on a bone stock 318 2bbl, I will cut .8 off my 1/4 mile time?

I think it's assumed if you put SM heads on your car, you've probably built matching components.