So I have a 1987 GMC V3500, 4 door long bed. It has a TBI 350/th400/205, 14 bolt rear and dana 60 front.
I am currently running stock suspension which is pretty darn sagged in the front, h2 wheels with 315/70/17's. I don't have a tach on it but it's pretty much wrapped out going 60 down the...