springs and shocks?
 

I ahve a 69 chevelle malibu with a 327. I dont have posi in the rear but plan to soon. I need coil springs and shocks. right now i have air shocks, are these really worth keepin? I would want coil springs that will lower my rear end so that the tire sits in the fender well nicely. i have 295 50 15 tires. I want springs that will help give me a good jump when i take off. id like to convert it to a 4spd also so when i drop the clutch i dont want the car to sag back then go, i want the front end to lift up somewaht and take off. does anyone know of some good springs and shocks? also if you know of what size i might need too? i dont have much money so i dont want the really expensive ones, just really reliable and good.