I found out (actualy installed them) that hedmann shorty headers for a 65 mustang will fit a 64 galaxie. The problem is they are only 1 1/2'' primaries and 2 1/2'' collectors. Patriot clipsters(JEGS<SUMMIT) shortys for a 65 mustang are 15/8'' prim. and 3''collector. Im going to get a set of the patriots and try them,in the picture jegs and summit shows they look identical to the hedmans.