Hello. I have an inline 6cyl 250CID with 3sp THM350, 2.56 gears and a monojet carb from my 1979 Camaro. It has the non-integral head. You refered to "catalyst fgr-efe." I've never heard of FGR but I have heard of EGR or "Exhaust Gas Recirculation." It was a system to pipe some exhaust gas back to the intake manifold. I'll have to look in my books at home but I recall it was an emissions system to reduce combustion heat or something similar. Not sure. EFE is another emissions system and I'll look over it again. I don't drive my car yet so I don't have an MPG but my uncle is a mechanic and he expects no less than 20MPG from it.
[This message has been edited by Greg (edited 10-15-2003).]
