Lol, one problem with the running it hard before I really need it is the only place for me to go now is out a rocky exit channel into the Exuma Sound.
Yeah, I was thinking that I'd go ahead and buy another pump that had the same mounting holes next chance I get. I probably didn't explain it best above, but the only real difference is the one hole that is a 3/4 inch to the side of where it should be. It's the top most hole. The pump I removed had two holes there. One that was used and one in the location that the new pump has that wasn't used. So, the original pump would have been universal to also fit the MG I guess. The two holes where I used spacers could have been solved by sourcing a couple shorter bolts. Holiday runs at 180. It just takes a while to get her up there. How quickly does the overheating occur if there is an air lock at the water heater in neutral at around 1500 rpms, give or take?