I believe OME coils give 2" of lift but im not entirely sure(anyone who knows pls chime in) as far as how much can you crank them the rule of thumb is 1.5" MAX otherwise your gonna lose wheel travel and ride comfort. If you wish to avoid cranking em for lift get the 1.5" ball joint spacers www.sdori.com Ive got a set and theyre great


89 K5 Blazer,TBI 350, 700R4, 6" lift, 40" groundhawgs,3/4 ton 14 bolt rear, 3/4 ton 10 bolt front, 4.88:1 Gears