340 valvetrain help

Also consider that it just may be how it is. A lot of these fast ramp camshaft designs are noisy. Couple that with roller rockers and there's more noise. Also too, the steel timing gears (which I am sure it has) add to the noise. It's normal for a high performance engine to make more mechanical noise anyway. Keep the possibility in the back of your mind that it may be normal for that engine.