I bought a '79 K20 yesterday, and am trying to figure out how much lift it has. The previous owner bought it with the lift, and doesn't know. It clears 40" gumbo mudders (roughly 36"-37" actual height), and doesn't have a body lift or fender trimming. There aren't any labels or part numbers on the springs, but there are part numbers on the shocks, and I don't know the manufacturer of the lift. Anyone have any ideas on how I can figure this out?