i know one person who swears by them and has a 1986 custom 12v SWB chevy dually and a '94 chevy with a 4BT and has built several others. it is a time consuming and costly swap but if you plan on towing its great. same goes if being different is your goal.
what i personaly know:
you can use the...
The f20c engine seems to be more highly regarded, seeing as how it is in the more upmarket and rwd s2000... but the k20 engine seems to be capable of more power with just bolt ons, than the f20 with bolt ons... and also the k20 has more torque at lower rev ranges...
so, my question is, which...
a foot away from the exhaust manifolds. without getting the trans hot or my engine... gonna be running ram horn exhaust manifolds and 2 1/2 exhaust dual with thrush welded mufflers