Thanks tj,

I will make sure to check the piston to valve clearance, and all others for that matter, even though the shop building the short block says they do all that, a little extra checking can never hurt,

Edelbrock say the heads will handle up to .525 lift easily, so the lift of the XE284 shouldnt be a problem, i just wonder how rough the idle will be? comp cams tells me that the specs show the cam as having a rough idle and vacum will be marginal at best, but they also say that thats in a 350, my speed shop/engine builder tells me since the cam is going in a 383 that it will be smoother? I dunno? i sure would like to hear from somebody that has a xe284 or something simular in a 383 to get there opinion,

Thanks again for your help,

Mach