I plan to put on my modified 3.4 headers sometime next week, but they dont include a smog pump fitting. Since my O2 sensor, on my stick exhuast, is downstream from my smog pump would it cause any problems. Thanks.
erik

Nah I ripped all my **** off and capped my headers and it passes emmisions and everything.

thats good to hear

I have a question - in dallas county, on an 83, is a cat and smog pump required?

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1983 Pontiac Firebird SE
LG4-Based Chevy 400
700R4 Tansmission
Modified 4 Barrel Q-Jet Carb
Accel Super Stock 8mm Wires
Edelbrock Pro-Flo Air Cleaner
3.23 Posi Rear
14X7" Cragar SS/T Wheels
35X4 CD/AM/FM Head Unit
100WX2 Amp
2 Pioneer 12" Subs in Custom Box

...not sure, but in Illinois all they do is a sniffer test. If you fail that three times then they do the visual, which requires that you have all your emmisions crap.

I'm not sure about there, but in Upstate NY they follow Federal emissions gudelines. No sniff up here, just a visual. I can't remove my smog crap.

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1985 Camaro Sport Coupe
LG4, 3.08 rear, A4
Bone Stock
1999 Blazer
4x2, 4.3L, 3.42 rears
Decidedly slow