340 valve train noise clacking loudly

I have run into the same problem with a set edel brock heads. I have a 408 stroker and decided to install a set of 60779 heads for a 360 and while i was installing them I noticed how flat they are compared to the stock heads. When I went to fire the motor up I had the same noise. The engine builder is going to show up tonight to hear it and I suspect that I will be tearing it appart again. His suggestion was to pull the motor and bring to his shop for him to inspect it and than put it on a dino before I re-install it back in the car. Like others have said to check all these clearances before you assemble, nothing is a direct bolt on in most cases.

Pat Faley
67 NB S Clone
408 stroker 4 speed
Peoria IL