Anyone give Hooker headers a try? They don't seem to be toooo expensive? (Not trying to advertise) I recall hearing only good things about this brand being used on older cars. Maybe the same for our cars? I found a couple different sites with them--
http://www.lethalperformance.com/pages-productinfo/product-5625/hooker-6233hkr-hooker-2005-mustang-gt-1625-longtube-headers-black-coating.html?zenid=f37a14b86d6cb008d62cd6e4dd126eaf
or these:http://www.ninosport.com/index.asp?PageAction=VIEWPROD&ProdID=536
http://www.lethalperformance.com/pages-productinfo/product-5625/hooker-6233hkr-hooker-2005-mustang-gt-1625-longtube-headers-black-coating.html?zenid=f37a14b86d6cb008d62cd6e4dd126eaf
or these:http://www.ninosport.com/index.asp?PageAction=VIEWPROD&ProdID=536