Half the crowd cheers, half winces — and both sides have a point.

An engine swap should be a joyous occasion, but this mechanic turned the process into a nightmare for more than 70 owners — and was jailed for his efforts.

At this point, mixing and matching the Big Three U.S. auto manufacturers' V-8 powerplants, both internally and across all brands of vehicles—engine-swapping, if you will—is a tried-and-true practice.

LS swaps are nothing new — if anything, the street performance world has been stuffing GM's finest big-cube V8 in just about anything that would take it for years now. Porsches, E36 BMWs, Mustangs, ...

Owning a classic car, truck, or SUV is a largely joyful experience, but there are definite pitfalls that come with the territory. Having a vehicle that is decades old in your driveway or garage often ...