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I adjusted these using JohnZ's method and they really sing. I'm happy so far, haven't got to drive it much, weather has been terrible.

I don't have audio of the sound. To me it sounds good. Too quiet is a relative thing. It won't rattle any windows but I've had compliments on it's sound. That cam is resonsible for some of it. Folks just think that lope is great. It has stock manifolds.

I have a 69Z with what I think is the original exhaust system. I think it's a June car. It still has the wrinkle bends in the pipes and resonators on both sides just a head of the muffler. The car has 48,000 miles. I put the last 500 or so on it. I've been told that the system is original to the car.

Thanks ED. I guess I put  the post in the wrong catagory too. I'll do better.

I'm lookig at a copmplete 327, double hump heads, 4 barrel carb, casting number 3858174, stamp pad,FII27HCR, engine turns free. Can abyone tell me where to go or tell me from the numbers anything about this moter. Year, vehicle it might have came in etc?

Thanks a bunch, that's what I needed to know.

Thanks for the replies. Dutch, in case I'm a little dense You are saying you think the cold method would be OK, just set them at .30? Instead of .26? I'm glad I found this forum lots of knowledge here! Even though I have two Camaro's, a 67 convertable and recently, 6 months ago, aquired a 69Z, I'm still learnming about this Z28.

Hi folks, still finding my way around here. I have a question about valve setting on a 30/30 cam. I read the CRG report on setting valves cold by setting the valves a 90 deg atdc for intakes and 90 deg btdc for exhausts. The report says this method does not work for roller rockers, it's for OEM stamped rockers. Is there a reason this won't work for rollers and is there a modofied method?