how about a 4m40 turbo diesel, late model variable geometry turbo. They are voer 300ftlbs of torque and 225hp I think. Should be more than enough and from what I remember theyb bolt to the v6 transmission. Will set you back around 2400 bucks.

8 Starion SHP, 87 mitsubishi van, , 81 galant g54bt, 78 lancer g54bt, 1965 Mitsubishi Debonair Deluxe
87 swb montero offroad pkg goin g54bt with sr locker 33x12.5 dual bouncy.