you don't have to buy a package, I am doing now my pedders. I did most all of the package but opted for the 5/16 rear springs and the 3/8 front drop.
I have headers and didn't want the front to hit the headers on a bump.
also have a harrop rear cover. I need the extra clearence because of the Holeshot Holestars rear wheels 9x15 going on the rear , with the goodyear eagle SS DOT drag radials. If you are going to the strip , the nittos won't cut it. you going to need the sidewall height to flex , thus a 15 inch rear wheel, or your not going to be able to hook at the track.
MT , bfg or goodyear drags are better. most likely the MT's are the best.
But i want to be a guinnea pig and try the new godyears out.