The class at Plymouth was a 602 crate engine with wings and it was just not a good combination.
This wingless series is a 604 crate that is allowed to be freshened within the specs of the 604 crate engine manual.
We run the same tires as the IRA but I suppose in Indiana they could run the same as USAC.
Spec is a 650 CFM carb from ATM innovations and a 6700 RPM rev limitWeight rule of 1500 pounds tech is rugged. We pump, Whistle, Check valve springs, lifters, fuel etc.
we only had 24 cars this week because the outlaws only wanted our top 24 in points.