75 chevy c10

[dondons84]

Hey guys first post and been itching to get this privilege. I got a 75 Chevy ahortbed c10 with an 8" lift. When I drive it shakes pretty bad. I have read that it could be out of balance tires or the driveshaft. My question is what is it? Has anyone ran across this? It shakes bad and is not normal at all and I need to fix this first. Next is the oil leak that isn't to bad and then restoring the interior. Least to say I got a mudder that a big time hillbilly jacked up from wiring to body