It was on my cars water pump when originally dressed as stock 302 but believe this is a 63-67 Vette fitting used on the 327 motors. I simply reused it but have found that
GM Performance has them listed on their website (click link) and they are also offered at CamaroCentral and have seen a few on
eBay (link) but would check to see of size is perfectly correct for your thread/hose size. They look very similar with that 6 sided design anyways.
