thanks guys for the info thus far. i have always locked dis and usually like 38 degrees but for some oddball reason i jumped from 32 to 40 i had it at 32 because i had a back fire thru exhaust when i let out but i fixed that with header leaks.after my 104 mph run with 32 degrees and 77 front jets with power valve and 92 rear jets with pv plugged i looked at plugs and they were white so a old racer at the track told me to go with the factory specs for the carb of 84 squared with valves so i jumped to 85 with valve and 95 with out . my 60 foot went to 1.63 and my 1/8th was 100 and my qt was 11.28 at 120 but i also had jumped my timing to 40. . my plugs looked gray to black and it ran like crap. so i went down to 80 front with pv and left 95 rear alone but i ran out of track time. im firly new to racing . i had an old 73 camaro that i had dialed in nicely to a 11.40 but im trying to the first of my small local group to hit the 10's i know this combo is capable but i have some tuning to do.my old 406 liked 1.3/4 pipes with 3.5 exhaust and slowed to a 11.60 on 3 inch exhaust . i will be keeping a close eye on this site so i can learn and tune it better . im leaning on 36 timing, slicks and no et streets ,4.30 or 4.56 gears and 1.3/4 to 1.7/8 headers and run them open at track and back to 3 inch on street. what ya think... thanks again