Well the old 7.3 is about to take a crap on me, valve guides are almost gone and there are many other things about to go.. But that is not the only thing.. I want either more power or more MPG's.. I figure as worn out as my 7.3 is, anything with a turbo (no matter how small) will be just as powerful. Now since I have my dodge, I am really in no need for more power, the dodge has tons of it and gets over 20mpg.. My ford is my snowmobile though so I am planning on a manual trans and then a small engine that gets wonderful mileage on the highway.. I DO NOT NEED power.. As long as it gets wonderful mileage I can deal with something slow, it already doesn't move so it will be nice to have something that doesn't move and gets over 20mpg. So what do you guys think I should drop in it? I know the 4bt is the engine most people use but they are so expensive.. I would much rather just find an engine in a tractor junkyard or something. I would love to have a BIG 4cyl.. something with a 5" stroke.... The torque is what I want. But before I ramble on more, maybe you guys can steer me in the right direction on which engine I should get..