Thanks Boyd-I appreciate it
UPDATE: installed bored out gasket and soda can shims. It was significantly better, although still was pinging just a little bit when revved to higher Rpms so I'll just need to add one or maybe two more shims.
No air leaks with them either which was great. I'll have to ride it hard and get it a lot hotter though before I can claim victory but it seems I'm on the right track.