These decades-old engines outlast modern ones — and anyone can fix them.

Over the years, we’ve built dozens of small-block, big-block and LS-based engines where we have set custom ring end gaps. We must admit that we rarely check the end gap on the two small stainless ...

Flat engines are horizontally-opposed piston engines, and this group includes Boxer engines, but not opposed-piston engines like the Cummins 14.3L Advanced Combat Engine (ACE) designed to power tanks.