How do I make a 1998 GMC K2500 with cranked Keys not ride so horrible (already got longer front shocks didnt help that much)
Yeah sorry man you need to body lift and return your keys to normal tension if you want an affordable lift. There aren't a lot of good options out there for lifts for the 3/4 ton trucks that are cheap.
Alternative is a full subframe drop which is wayyyyu more involved and $$.
Literally body lift is only real option on these trucks if you're trying to get any more than a 1/2" lift or so cheaply.