Thanks guys,

As far as launching the car I posted it in my first one but neglected to on this one. The cars a 68 RR 4spd 4:30's the car made 380 hp at the tire before I installed a Landy built 174 B&M supercharger with 6lbs of boost the car should make 670hp at the crank and a bit over 500 at the tire. I used to launch at 4k naturally aspirated but now roll out at 1800 to 2k due to tire spin. It now runs 28x11.5 Hoosier quick time pro's before I had MTs street ET's which were 1" narrower at the footprint. The cars best naturally was 13.01 I've yet to make a good clean pass blown. Sounds slow? But remember I'm at Bandimere in Colo with an alt of 5800 ft which after correcting ='s way over 6500 ft-You flat landers are lucky!By the way the car weighs 3730 with me in it!Thanks again-Gary