Rebuilt 71 -72 water pump casting number 408328, julian date looks like 343, hard to make out the middle digit but definitely 3?3. I acquired this pump with a bunch of other stuff and the seller said it was only installed 5 months before he tore the engine down. Looks to be in good condition. Measures 5-1/8" ~ 5-1/4" from gasket surface to pulley flange. Make me an offer, located in Houston, Tx.