I bought this brand new water pump and put a flow disk in it a few years ago, I had it on a 305 in a van for a while then on a 4.3 for a while total use time was less then a year then I stored it and used it on the 350 on my present Astro and took the intake off once due to a leak replace gaskets and put it back together, then I replaced the inlet tube on the intake that the top radiator hose
attaches too. Now its leaking again? SO I got under the van with a flashlight with the engine running and its freaking leaking from the tiny hole on the water pump. All that just to find out the water pump is bad? Anyway just remember used water pumps are probably not a good way to save money. Papa Mark