shock recommendations

help me out guy's / yesterday i ordered my rear springs from ESPO Springs & Things
here is what i bought rear leafs for a 340 dart 6 leafs each side with a 1in over stock ride height /poly bushings /new u" bolts for the rear and shackle kit all for $446.00 my car is a 1970 dart that is gonna get a 408 stroker and i will be running a 391 sure grip / what would be the best shocks for the rear ? it is gonna be a cruise in car which will get some drag strip use on occasion ! All opinions welcome thanks