Buy hookers or a lift kit?

[Kent Bingham]

My truck is a 1980 GMC Sierra Classic, small block, 4 wheel drive, short box. Previous owner put some headers on. Turns out the front driveshaft is beating the everloving snot out of the one header tube on braking. Front end sags obviously. I hear that Hooker headers have more clearance than the current Hedman headers, so I could replace them. They are new though. My other option is to put a lift on it. I've done a few jeeps but no GM's. I figure the 37 year old springs could use swapping out. The only reasonable lifts that I find, under 6", use lift blocks in the rear. I'd like new rear springs. Anyone know if I can get a 2"-4" lift that has new rear springs? Or possibly taller springs from something else that I can match the front lift to? Should I buy new rear leafs from LMC or someone and then use the blocks? Let's have your thoughts.