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I had a 91 YJ with a tired 6cyl. Got a 350 that was redone for off road. 340 hp, 380 ft lb of torque. I found out after I could have gone to Chevy and got the motor for a quarter of what it cost me from the specialty shop. It is really not that much to swap it out. You get a bell housing...

If you are using it for every day you don't want to go that big, it may look cool but all the things that go with going that big are a real pain and will up your every day driving cost. The largest tire you should go is a 33 with a 3" spring lift and 3" body lift. The higher you go the more...

First off as you are finding out not many shops really know what they are doing. It is best to read up a little and do the job yourself. It is really not that hard to flush your coolant system. I have found that doing the flush twice is best. After you do the flush pull your radiator out and...

I haven't seen any mention of tightening up the steering gear its self. My Jeep walked on my and I simply tightened the gear all the way down then backed of a 1/4 turn and it has been great since. You may want to think about replacing the gear box at some point. Make sure there is grease in...

Did you change the timing as putting headers on will change what is needed.

I am a 91 YJ Wrangler owner, I have had it for over 10 years and have modified it so that it has a higher resale than what I bought it for. That being said, I had the opportunity to drive a Patriot a few years back for an extended period, didn't like it. It all depends upon what you are...

I had a tired 4 liter also and decided to go with a 350. The only thing I had to really do was the engine mounts and an adapter to the trainy. I would swap out the automatic for a standard, you would have more control over what your jeep will do. If you do that you can get a direct bolt trany...

Water is used on some tractors as a cheep way to increase weight. But the water would create all sorts of problems besides being hard to change a tire. If you don't have your tire filled up 100% with the water there will be a shifting of weight, a sloshing from side to side or shifting when...

While it does expand like all other gasses, about 1 lb for every 10 degrees of temp rise, it does take longer to leak from the tire so you don't have to fill your tires as much. It also is a dry gas so your steel rims will not rust on the inside or less likely in the bead area. Racing uses it...

I have 15X10 rims and the tires are nitrogen filled so temperature factor has been pretty much eliminated. Your better tire installers will be using nitrogen. My tires are fairly new and I constantly check them for wear. I have to air down even more to get a wear I am satisfied with as the...

I did a little looking and the V6 would be no better than the 4 liter straight 6 Jeep engine. One thing you may want to change now and will help you get down the road is the front and rear gears. Put in 4:10's, your rpm will go up but it will give that tired old 4 popper some help until you...

Since you don't really have a good transmission to put behind your 350, find a NV4500 with a transfer case. This is a GM direct bolt on transmission. This transmission has been around for a long time and is considered the best replacement for the original Jeep trannies. My personal feelings...

I had the same problem but with the 4 liter. To do the rebuild you might as well go with a total engine swap. I put a carbureated 350 in mine. I wanted to work on it myself, that is why I went low tech, also a carburetor produces more power than fuel EFI. I get almost the same gas mileage...

I have gone cheep and I have high end tires. Check out this web site and you can make your choice, it has steered me right. Mud Tire Reviews, Offroad Tires, 4x4 Mud Tire Reviews - Offroaders.com. I presently have Pro Comp Extreem Mud Terrain 33x12.50x15 and they are great for all conditions...

I have a 91 myself, it will be with me till I can't climb into it. As others have said you can modify it to your hearts content to make it even more fun. A bit of advice though, there is some maintenance that you should do as I am finding out. I am in the process of going completely through...

I'm in the middle of what you could say is "Beefing Up". I to had sagging springs so I put a set of Skyjackers 3.5 inch with 3 inch body lift. I run 33x12.5x15. By doing just this the ride got a lot better but was lacking in power. I had a 4liter that was well used so I dropped a built up 350...

Over the past year and a half I have been modifying and restoring my YJ. I don't have a large budget so I've been doing the instals by myself. Some of the items like replacement floor insert and "Deluxe Carpet" do not fit so well and must be modified or only some of the item used. My advice...

I am doing a 350 conversion and have been trying to find information on wether to do a fenderwell header or inframe. If I do the fenderwell I plan on side pipes. The inframe would go into Flowmaster 44's and out infront of the rear wheels. If anyone has in put as to any problems with either...