well i turned my back half 70 camaro 3400 # w/driver into a round tube chrome moly car. lost 700 # off of car now 60' is slow. car 60' before 1.28-1.29 with 468 bbc steel heads & p/g. same drive train as before car 60' 1.35- 1.37 jan 1st @ richmond dragway. best run before was 6.29 @ 110 in the 1/8. car went 6.02, 5.98,6.01 @ 117 mph now. the onther change i made was the new headers dynatech pro stock style vs old hooker super comps. are the headers killing torque ? or do i need to change my converter. current 8" mrt tree master w/5500 stall.