For that weight go comp 268 or 270 single pattern cam run no higher then 26 26.5 tall rear slicks the 28s will cut the 3.91s Do not run the dual plane performer runs a stock intake before you use that paperwight. Get a LD340 performer RPM or Mopar intake Car will run arond 14.3-14.6 average at around 93-95 mph. By the way get the timing up to a total of at least 44-46 degree's total if the pistons are below the deck 7.5-8.5 to one comp jst the 750to 70-71- frt rear no more then 77s depending on air temp and altitude