Smog

[COPO PETE]

My 69 427 Chevelle came with smog (4 speed) and my '70 LT-1 Nova had smog. Not sure about automatic 69 COPO Camaro's though. Still get conflicting reports on that!
Peter

[Keith Tedford]

Our car, like COPO Pete's, had the full smog pump setup, #68 primary jets, and retarded timing to meet emissions. Some cars, like our '72 400 Lemans Sport, could meet emissions without the AIR pump. I heard rumours at one time the the automatic COPO cars got a hydraulic cam and were rated 410hp. Anyone know anything about this?

[Chevy454]

Yenko offered a 410hp 427 in '67(?) that was hydraulic cammed...maybe that is where the rumor started?

[Steven J]

I bought a '69 L78 Camaro/auto, in 1970, and it had a smog pump.

[bkhpah]

A local man who bought a 67' Yenko Camaro with the 410 HP automatic set up had his car equipped with Thorley headers from new. He has shown me the original paperwork for the car. But once again this was a Canonsburg sold car and more often than not you see extras sold on those cars. I cannot tell you anything much about the SPAN sold cars. He did tell me that the time of the first PA inspection the local garage would not inspect the car because of the headers. He took the car back to Yenko and had manifolds reinstalled. Back in the old days PA had twice a year auto inspection...BKH

[Keith Tedford]

Is there any chance that the '67 410 hp engines were based on the 390hp 427?

[MrMotion]

Is 1969 the first year for mandatory smog equipment? Were pre-1969 export models exempt from smog equipment?