81 vs 85 smog equipment - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ponjohn · 03-28-2003, 11:10 AM

I have an 81 c30 and bought an 85 c30 454/t400. My friend has an 84 c30 454/ t400 w/ 60k original miles on it.

Anyhow the amount of smog equipment between the 81 and 84 is minimal. The amount of smog equipment from 84 to 85 is astounding. The 85 has dual A.i.r. pumps all kinds of vacuum lines to and from the air cleaner. Tubular headers with the air fittings. It is gross.

What gives?.....................john

79BIG10 · 03-28-2003, 11:58 AM

In Texas 84 and older do not have to have a cat. This may be the year the EPA started cracking down on vehicles.

03-28-2003, 11:10 AM	#1
ponjohn Registered User Join Date: May 2002 Location: woodbridge, ct. usa Posts: 145	81 vs 85 smog equipment I have an 81 c30 and bought an 85 c30 454/t400. My friend has an 84 c30 454/ t400 w/ 60k original miles on it. Anyhow the amount of smog equipment between the 81 and 84 is minimal. The amount of smog equipment from 84 to 85 is astounding. The 85 has dual A.i.r. pumps all kinds of vacuum lines to and from the air cleaner. Tubular headers with the air fittings. It is gross. What gives?.....................john

03-28-2003, 11:58 AM	#2
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,775	In Texas 84 and older do not have to have a cat. This may be the year the EPA started cracking down on vehicles. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson



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