I have a 89 diesel Burb V1500, and I want to raise it 4in but not sure if I should go with the 1500 springs or the 2500? If I did go with the 2500 springs would there be any mod's I would have to make or would they just bolt right up? Any info, Pro's or Con's to the desicion would help out a lot.

Rather

will you be towing with it? if not buy the 1500 springs. ones gonna be stiffer then the other thats all. no there shouldnt be any difference unless the 2500's are 56" springs

The 1500 kit I am buying comes with 56" springs. Will there be major Mod's or what?