I have a 216 for my 1951 chevy 3100. I took it to my mechanic after purchase. It was taken out and sent to a machine shop and following planing was peiced back together and ran. I took it out a few times for about a mile or two. I went to pick it up and drive it home when I had a sudden loss of power up a hill and the truck died. The mechanic is now stating that the head has water in it. I would love to know what to do next here should I try to take it back to a machine shop for another look, should I scrap the engine. Any replies are welcome. Thanks