the engine in my 91 4runner is knockin i want to put a 3.4 out of a taco in it can i do this with out running into alot of problems and fabricating

 

Welcome to YT.

Read through the section you are now in:
https://www.yotatech.com/forums/f160/

 

Holy search batman.

Offroad solutions (I dont like them but they are the only ones with kits, prepare to wait 8months to receive the hole kit and you will never get anyone on the phone and if you do he will likely be dumb)

 

As engine swaps go, the 3.0 to 3.4 is about as easy as it can get. It is a mechanically bolt up conversion, and the electronic aspect is not terribly tough. Read this section, and you will see many examples of how to go about it, and the various snags that we have encountered along the way.

As to ORS, I had a totally opposite experience with them. I did use the full conversion kit, and I received it in a very timely fashion (2 weeks after I furnished a couple of needed plugs and the old 3.4 crossover pipe, for the flanges. When I ran into problems, Mike (the owner) was happy to help me over the phone. I did have to wait for a call back a couple of times, but you must remember that they are running a full 4x4 shop, and are sometimes busy with matters at hand. I have no problem with recommending them to anyone.

 

If you do your research, you will find that you don't need anything special, everything we used was from the parts store, or made ourselves.

 

Mechanically, it's an easy swap, with little fab work. You'll need to swap your oil pan, pickup, and dipstick tube over. Easy. You'll need to use the clutch and flywheel from the 3.4, with the throwout bearing from the 3.0 (assuming manual trans). Not hard. Custom crossover fabbed by exhaust shop or build your own. No sweat if your welding skills are good or the shop does good work. Drop it all in and bolt it up. Move your battery over. Relatively easy. Solder a resistor to the back of your tach. Hardest part it rewiring the harness, which isn't too tough, once you figure out the goal and the wiring diagrams.

All in all, I did mine over holidays in about 12 days. I could do it in less, knowing what I know now.

 

I never would have done the swap without the full ORS kit. The help from Mike was invaluable. Now that I've done one I might consider doing one without the kit if I had a lot of time, but the first time around it was too hard for me and I didn't even attempt the wiring harness. I must have talked to Mike 200 times asking for help, that right there was worth the price of the kit.

 

i just did my swap into a 94 4runner, i got to say that the mechanical swap is pretty straight forward, i made my own parts, i didnt order a single thing from ors, after i was finished i have about $2000 in parts including the engine, that also includes a new exhaust,body lift, new clutch kit,new radiator, all new hoses, timing belt kit,water pump and your other needed parts. if you cant fab the parts or do the wiring yourself you can spend alot of money.there is plenty info here at yt if it hadnt been for elvoto and mt goat posts it would of been a little rough.