Smog

[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?

[William]

Several car magazines tested Hi-perf bb/auto cars in 1969. Hot Rod did an L78 Nova, PHR a L89 Camaro (last seen on ebay), Super Stock the #5 ZL1. All these had AIR.

PHR also did a L34/auto Nova, no AIR.

[Ray Morrison]

The 68 Gibb automatic COPO Nova's came with the smog pump. If you happen to have the Nov. 1968 issue of PHR, there is a picture of one in the article about the 396-427 Nova's Harrell prepared.

Ray