Quote:
Pretty sure the Indybrocks come with a 2.05 valve. When you upgraded the valves did you stick with that size or jump up to a 2.08 valve. When I see a head stall like that on a flowbench and start backing up its usually a high airspeed issue. I'll bet its well over 400fps over the short-turn. With your 712 lift cam you are well into the affected area. The flow numbers you posted are in the area of what a ported set of heads with a 2.02 valve usually end up with. A 5200-5500 stall convertor would really help out at that weight (3400). I don't know how you guys make a small-block Duster weigh that much. 
My old car( 70 Duster), at one time weighed 3400 or a hair more, 300 pound driver, mild steel cage, all steel car, frame connectors, bench seat, etc, etc. Real easy to weigh that much in an all steel caged car, especially with a 100 pound bench seat in it.
Had it across the scales at multiple tracks.
btw, i agree with Keith, i would expect a 587 horsepower car at that weight with a 904 to run 10.40's sorted out.
Last edited by B3422W5; 12/31/12 12:48 PM.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, low 10.30’s 1/4
1.41 best 60 foot
6.56 at 104.17
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