The current 370-inch engine has a set of Edelbrock heads with an 185cc intake runner, 2.02/1.60 valves, and a 54cc chamber. They flow 260 int/182 exh cfm at 0.500 lift. On the larger engine we are going to use the 235cc Indy Cylinder Heads with gonzo 2.10/1.65 inch valves that flow 262 int/209 exh at 0.700 lift, and a 53cc chamber. We also plan to use 1- 7/8-inch headers and the Hogan tunnel ram.<span style=""> </span>