Thanks for the replies. So nagging was the question of what was causing the clacking that I got up this morning and took a look into it. Come to find out the the exhaust poly lock on the number six cylinder hadnt seated entirely when I assembled these AFR heads and when it did, most likely during th...

Today during testing I took my 383 well past my shift point of 6300 to 7300 RPM. My shift light is set at 6000 for the delay effect and I never saw the light. I saw 7300 and shifted. So back in the pits I noticed clacking coming from the right bank head, the sound of loose rocker arms. Oh, not runni...

I'm considering the AFR 227 Race Ready Head for my setup and wanted to know with the 60/40 valve configuration would I have to use offset rocker arms and would piston to valve relief be an issue?

Any help would be appreciated.

Rich