[19bonestock88]

If were talking about swapping a modern four cylinder in place of an old one, I have to vote for the 2.4liter LE5... It's got variable valve timing and runs pretty efficiently in the cars they come in... Out of the box(in the cars they originally come in), they're good for 170-175hp and 30+mpg... Half the frictional loss of a V8, and enough power to motivate an older S-10... In fact, I'd love to dig my old Ranger out of the weeds and do a retrofit on it... There are off road swap harnesses made by Alpha Fab industries, so swapping one of these into even the oldest of compact truck becomes just a matter of making it fit...