> I may be wrong on this (because of the age of our Deloreans) would I'm also no expert, but I believe it goes by the age of the car itself (not the motor), so you can put newer engines (Northstar) into older cars (Delorean) without EPA problems. On the other hand, you can't take a 1960's Ford 429ci engine and drop it into your 2001 Dodge Neon. -Hank #1619