'68 C20 lift

[TXPNTCGMC]

Newbie here, I know this is a suspension topic and I am probably not the first to ask this question, but where in the heck do you find information on lifting a 3/4 ton 2 wheel drive for a '68? I've searched high and low and have come up with barely anything. 4 wheel parts didnt return my call (go figure) and a local shop Mikes Off Road didnt have any answers.

All I want is another 2-3 inches, do I just do the add-a-leaf approach for the rear and go with bigger coil springs up front? I dont really want to do a body lift because of looks but maybe somebody can sway my opinion.

I was just hoping somebody else out there who sees this has been through this same deal and can steer me in the right direction. Thanks!