Definitely try loosening the mounts with the engine supported by a cherry picker. See if you can get things a little more level then. Slant six or V8 k-member? From what I understand neither kit (for a 6 or 8 k-member) require any modification of the passenger side mount saddle. I do know that the V8 kit requires cutting off the driver side saddle and drilling a new hole for the large bolt. That hole may be slightly too high...