I'm looking to do an engine swap in my 1985 4 Runner. It currently has the 22r electronic fuel injection engine. This engine is extremely weak, will not turn the tires over in slick mud. I am running 33x12.50 BFG's, with a five inch Skyjacker left with Skyjacker shocks. Everything else is stock. I am looking to install a Chevy 4.3 V6. Any recommendation and/or thoughts would be helpful. I am not sure if I will have to replace any other parts "ie" transfer case, gears, transmission. Thanks in advanced for any help.

 

4.3 definetly check out my build threads.. I got one on the 3.4 and the 4.3 which I highly highly recomend for you if you want cheap reliable and strong motor. Its american dude good luck

 

go for the 1uz , just finishing my swap took me about 2 months shes running but still have a few little things to button up. Lots and lots of work but hey V8 power Baby!!

 

If it's all stock besides the tire size you should look into regearing it for the tire size and lift it will most likely get you better gas mileage and better performance plus it's cheaper then a motor swap and if you do the swap the gearing can only help.