Subject: RE:GM LQ9 6.0 Engine - C4 Swap? by CFI-EFI on 2008/1/13 1:55:52
Quote:
Hell, pickups, for 49 states, were not required to have cats until 1981, I think.
I have a 1978 GMC 3/4 ton 4X4 with "Heavy Duty Emissions". The truck has a GVW of over 7500 pounds, the qualifier for the HD Emissions, I think. The closest thing to emissions equipment is a PCV valve. No smog pump, no EGR valve, no cat, no nothing. The standards it is supposed to meet to pass a smog test are ridiculously high. It has a SBC 400 with a quadrajunk carb and what is amazing is that it will pass the smog test for my 1984 EFI Corvette easier than the Corvette does.
