A Possibly Relevant Site for JEEP Modifiers

This is actually written for the Toyota Land Cruiser, but since extensive use is made in existing JEEP Swaps of GM trannies I think
(since everyone here has been so patient) you will find this relevant:
"21.2 Diesel Engine Swaps I'm starting here because to me this is the swap that makes the most sense for a rock-crawling machine and is probably the least explored. As you'll figure out shortly, I'm pretty opinionated on this one and I welcome anyone to dispute my views. __I believe that diesel engines are superior to gas ones for offroad use__ (emphasis mine-but a common view in ROW) for many reasons. They tend to make usable torque at much lower engine speed than gas engines. This means you don't need nearly as low a crawl gear. They also feature a much flatter torque curve. There is no ignition system to fail because of moisture. They are not as affected by altitude, in fact, turbocharged diesels are virtually immune to altitude. In most cases, even though they have all the advantages of a fuel injected engine, such as the ability to run at extreme angles, they rely on mechanical injection which is considerably simpler than electonic injection. Diesel engines also tend to get much better fuel economy and greater cruising range than gas engines of similar displacement.
There are three commonly available engines that are suitable for swapping into Land Cruisers. Probably the biggest obstacle to the conversion is finding the engine itself. The GM engines are the only ones listed here that are available in light-duty automotive applications. The others are all industrial/medium duty truck engines. These motors tend to be snapped up as soon as the vehicle they were in is wrecked and rebuilt by companies with exclusive licenses. Unless you're willing to pay top dollar for a rebuilt unit (not a bad idea) you have to somehow find a way to intercept a motor before the rebuilders get their hands on it.
The most easily obtained is the GM 6.2l diesel. A conversion kit is available from Mark's Adapters in Australia to mate a GM diesel to a Land Cruiser 4 speed manual or automatic transmission. The GM V8 supposedly weighs about as much as a big block, so pretty close to the weight of a 2F. The L65 is found in C/K 2500HD trucks, C/K 3500 trucks and C/K 2500 Suburbans. The L56 is found in C/K 1500 trucks. C/K 2500 LD Trucks, K1500 Blazers/Tahoes/Yukons, and C/K 1500 Suburbans. The 6.2l is found in all pickups and Suburbans, and in Chev/GMC P30/P3500 step vans."
From the same author: later
"There are only a couple of reasons for putting a motor bigger than a 383 or even building a high horsepower 350. They are if you intend to put on tires that are so large that re-gearing to return the tire:gear ratio to something approaching a stock level is impossible, if you drive your truck in deep mud, snow, or sand, or if you never quite managed to get that adolescent desire to try to peel your tires off your rims out of your system. "
(I always had to buy my own tires and so never had any desire to burn rubber. That's for punks.)
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