Thanks Ron, do you remember if yours had the block FoMoCo script? It's my understanding that all closed emission 65-66 caps, at least the chrome ones found on GT350s, had the oval FoMoCo script. Dave In a message dated 6/28/2005 7:39:31 PM Pacific Daylight Time, ronald.robertson@sympatico.ca writes: > Looks to me just like the one we had on our 1966 Mustang with Thermactor > emissions control. > Ron > > >> ----- Original Message ----- >> From: <A HREF="mailto:dmgt350@aol.com">Dave McDonald</A> >> To: <A HREF="mailto:ShelbyMustang@carmemories.com">ShelbyMustang@carmemories.com</A> >> Sent: Tuesday, June 28, 2005 6:27 PM >> Subject: Oil Breather Cap Application? >> >> Does anyone know the specific application for this oil breather cap? This >> is an original cap (not a repop) which as you can see has the block FoMoCo >> stamp and was originally black. I just cleaned it up and repainted it. It's a >> push-on type. I know it's for the closed emission cars but would like to >> know what year(s), model(s), engine(s), etc. >> >> Thanks, >> >