Story of a JGY Customs Rip-Off: Unbelievable. This guy contracted JGY Customs to drop in a SR20DET into a Datsun 510. The SR20DET is fairly common as far as engine swaps go, so this is a doable project by anyone with moderate fabrication and automotive knowledge. Just take a look at the results! There are so many egregious errors it’s just plain funny!