I made 3 pulls on the dyno tonight.I have 350 with AFR 195 head's,Lunati hyd. roller and rocker's(.495 lift on both valves is all I remeber offhand) air gap intake,750 Demon carb,MSD and Hughes 700R4,3.73 gear. Air was real bad,103.3 degrees,28.57 barometer 263 rwhp 276 lbs. torque. We messed with the timing,ran 40 degrees total advance and lost 30 horse.Ran 36 degrees and got the best pull.The air fuel was 12.7 to 1. 13 to 1 is optimol.It was a neat experience. Ran up to 6000 RPM,That is singin settin still in 3rd gear under a load!! It tells you alot of thing's even if it detonates the graph show's it.