1967 barracuda leaf springs

i don't know whether to add a leaf in my old springs or buy new springs . we stuffed a 383 built 727 trans 420 gears 500 h.p. ? in this 67 fastback,it was a 273 car. i have checked with jegs ,they have competition leafs but drivers side has 2 fewer leafs than passenger side , made for drag racing. drivers side of the car is about 2-3" lower than passenger side with these. now, can i put the passenger side springs on both sides so car is level or will that screw me up when i do get on it???? suggestions?? thanks, randy