/6 to much cam

I might of over cam my slant 6. It won't run right. I've done a complete 3 angle valve job with comp cam springs. Up to 500 lift. Switched to hei. I'm running a 276/490 (PURPLE CAMSHAFT ) headers 500cfm. just don't know what else to do. Any info would help.

Thanks Fabo
It won't run right.
That's a pretty broad statement.
And so is "it runs but no power".
Hang tuff, the guys will get you going in no time.