Which rear springs and shocks?

Looking at the Mopar SS springs to raise the rear of the car for more tire clearance. Looking at Summit's catalog they have the 002/003 original 1968 Hemi SS springs or the 865/866 3300 lbs springs. I was wondering which ones would be the best choice. The car is a 71 Duster 340/727/8-1/4 that I would guess weighs about 3200 or a little heavier. Car is street/strip and I need to get some traction badly. I'll be getting some drag radials later on also, but the tires rub with the stock springs if I hit a big bump in the road.

Also what else new hardware should I get with the springs? And what shocks are everyone using with the SS springs. I have some cheap Napa shocks there now and would need extended ones for the new springs anyways.

Thanks for the help.