I have just read the tech article on the head porting and thought it was great. But I am wondering will alot of that info apply to the 429 heads? I am ready to start on a set of 429 (C8VE-E) heads and am wondering about the guide bosses. Can these be ground down like in the article or will it be different with the big block? Or will the cam size affect how much should be taken off? My cam is the COMP Magnum 292 hyd. And I am also having bronze gudes installed.Any helpful hints on porting the 429 heads would also be GREATLY appreciated. Thanks,JD