Bought 94 80 has 256k. Smokes heavy at start up. Still has everything but cats. Does this engine need new rings or just need total rebuilding. Runs great just doesn't have a lot of gitty up and go. Using mobile 1 high mileage syn 1030. New to this platform. I don't know if it is AWD or 4wd. Has separate shifter that has h n L. Any thing you can take off this sled to make it accelerate any better. Seems like a lot of stuff could be deleted. Any help appreciated.