I looked at your other posts under your user name and really didn't find anything that related to this issue but I''l take your word for it. I always thought that after market heads had bigger exhaust ports (not smaller) so it made no sense when you wrote that the exhaust ports didn't have enough material to seal...unless the EQ and MP R/T ports are so large that they are bigger than 360 magnum head exhaust ports??
I understand that you can't respond....I'll wait til later for your response.
treblig