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**WorkinLonghorn** · 09-24-2007, 10:19 AM

Does it have idle mixture screws? That was one of the smog carb changes (we're talking California here);you couldn't adjust the idle unless you drilled out a plug or removed a limiter cap,but I'm not aware of any other negative aspect to these carbs.They were part of the CCS (Controlled Combustion System) which set a leaner mixture,higher engine operating temperature,and heated (100F) air intake.
I think I'd try it out and see how it works before deciding.

09-24-2007, 10:19 AM	#4
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,887	Re: 1980 Quadrajet Does it have idle mixture screws? That was one of the smog carb changes (we're talking California here);you couldn't adjust the idle unless you drilled out a plug or removed a limiter cap,but I'm not aware of any other negative aspect to these carbs.They were part of the CCS (Controlled Combustion System) which set a leaner mixture,higher engine operating temperature,and heated (100F) air intake. I think I'd try it out and see how it works before deciding. __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme. Last edited by WorkinLonghorn; 09-24-2007 at 10:21 AM.