I have a 416 stoker in my 3000lb. Duster,I run 28X11.5 tires, 4.30 gears, 32 degrees of timing, 1/2 inch fuel line with a Holley blue pump,RPM Airgap intake, 750 DP Holley,ported J heads with 2.02 valves,solid lift custom cam, 10 inch Turbo Action converter, the coverter is a little loose on the top end but it works OK, I shift @ 6500 and run 6700 thru traps,it runs 10.90's all day and 10.80's in good weather.