There's no replacement for displacement so I'd swap in the Chevy 4.3 l V6 and tranny from a small Blazer. I have a 4.3 in my full size GMC Pickup; it will tow 5000 pounds no problem.


83 mitsu flat bed 2.6l weber, 88 auto tranny, 2" body lift, 4.625 LSD, 235/85-16E mudders (33 x 9.50).