Roush 427R-095 with Pro-Systems carb set up for acceleration, 1000 cfm, Trap 130+ mph 70F day or cooler with baro 29.8 or higher. 2 inch primary headers in view from Olthoffs. They don't cover 1/3 inch of exhaust port as Superformance headers do on AFR 205 heads(Roush heads)