360 /380 hp crate engine noisy valve train

What kind of oil are you running? Sticky lifters? A hydraulic roller cam shouldn't make much noise. I put a Hughs cam in my 360/300 and it doesn't sound any louder. You could check the torque on the rocker mounting bolts. Been fooled by header gasket leaks a couple of times. They can tick as if they were a valve train noise. Found them by feeling around for the air flow.