96GT heads cam intake

I won't be able to help you w/ your specific problem, but perhaps you could list mods and what specific type of cams, valves, etc.

A video will help people to.

NOTE: there were some recent posts on noisy engines specific to cams. I'd lookup those threads for some leasd..
 
From the experience with regrind cams I saw everyone go through a couple years ago I will not even think about regrinds.
I went with Comp Cams and everything is as quiet as stock with a nice lope and no issues.

Dwayne