Header Leak??

On my 360, I have the TTis, Aluminum heads and the original TTi supplied header gaskets. They are all 14 years old and 125000miles. During the 1st 4 years of the Formula Ss life, the headers and gaskets were transfered onto a 318 for winter use and back onto the 360 in spring. I cant remember ever retorqueing them in the last 10 years. The nickel plated TTIs started leaking though at the 10 year mark; at the joint where the pipes connect to the collector.At the top of course where they collect water. So far I have been able to repair them, but the joint line is getting pretty thin,now. One day I may weld on new collectors. Or maybe a slip fit...