Ditto. The mr2 engine has no bottom end. You pretty much hafta stay atleast mid-range to be productive, and that's in a car that probably weighs around 1500lbs less or so. Samurai maybe, but 4runner would be disasterous. You'd be far better off finding a good taco/t100 3rz to swap in, much better power than the 22re and a FAIRLY easy swap.