Isuzu 4 banger that was used in a Chevy Luv truck, I had one of these and had the dubious honor of being the slowest car at a huge points meet at Ohio Valley Raceway back in the 80's. I ran triple Z class and they just gave me a trophy and ask me to leave because they didn't have time to waste letting me make a pass.
Any motor that the used in an Intrepid. There are so many nice Intreped bodies in junkyards because the motors were crap and they wouldn't last long enough for people to even crash them.
Just about every motor Mitsubishi made back in the 70's and 80's (and probably still today)
Renault motors
Fiat motors
I could probably list a few more.