New Here: Suspension ?'s

[72C-10]

Hey guys, Im 15 and I recently sold my 87 dodge 318 to look for something more gas mileage friendly, well my dad runs a used car lot and while at an auction I found a midnight blue flake 72 c10 that I had to have, well I get the truck home and am surprised at the shape, interior is great but just one piece off the drivers armrest, i installed some new speakers and cd player and put on a new rear chrome bumper and picked up a new holley 670 street avenger carb yesterday for it along with some dynomax headers for the new exhaust, the motor is a fresh 350 .030 over (355) with a comp cam,1.6 roller rockers, aluminum intake,holley carb, all that bolt on stuff. the body is straight and it has a tonneau cover, a good one with the rails so it doesnt sag and it doesnt have all the snaps runnin down the bed, slide out system, anyway to the suspension questions, the suspension in the rear is the stock coil suspension with the shocks, no leafsprings, but it has the "auxiliary spring" and correct me if im wrong but will this need to be adressed if i go for a 4in coil drop in the rear because to me it looks like I will be resting on this after the drop. Im new to c10s and ive been readin on the site alot, get my license in couple months and i gotta have it lookin nice so I can intimidate some ricemunches being how my town is overrun with civics with 6ft tall wings that make it go 200mph. thanks for the help, havent typed that much in awhile.