18;20;22R/RE, KA24DE, S14, K20, triumph 1.6, saab 900turbo, ford model T, jeep hurricane 2.0/go devil, 4g63/420a, ecotec, my favorites. out of all of those, id have to choose the S14 BMW engine. not a big fan of vtec but it will get you around without breaking down. not really worth time and money though. KA24DE is awesome. i have one in my Xterra. but it has a kind of poor head design (timing chain design needs help) 22re has a single row t chain. might as well have a belt. the constant velocity carbs in the triumph engines are crap. but slap dual webers on that fucker, and it will FLY. the rest of them are just god, not great. ive owned many cars. i know whats up.