I'm trying to decide what front springs to get for my 97 when I do the SAS. My truck weighs aboot 6500#, so thinking a heavy duty spring may be in order. I'm looking for 4", and was thinking of TCs, but I know they are soft, and will settle to next to nothing in no time. My 89 is still heavy, and with unknown front springs, of which I think are HDs as well, settled over an inch. This is for a d/d, so I don't need to flex the tire over the hood, but looking for a decent spring, that won't settle to a negative arch, without costing an arm and a leg......