All great suggestions and thanks for the replies. To answer the question about the history of the truck, this is a rebuilt 235. When I first put it all back together and started it up, it didn't overheat but it leaked bad from the radiator I bought on E-Bay. The only things I've done since then is remove the radiator and replace it with the new one and then refilled the system and also I rebuilt the temp control valve for the heater replacing the seal since it was leaking into the cab the first time I started it up with the old radiator. Dave, I looked at one of those adaptor plates in the catalog, but I saw a post somewhere that mentioned it would be a problem getting it to work with an early 60's car engine and mine is from a '61 Biscayne, so I opted for the short-shaft water pump instead. It does sit low down on the radiator the way it is installed and I had to use the flat back fan. Even at that, I only have about 1/4" of clearance, so I don't know if the larger fan you mentioned would fit or not. Also, the system didn't take the full 15-16 quarts when I filled it. I was able to get in about 12 quarts, although it might have gone down a little on the level before I had a chance to fill it on up. Once it started overheating, I shut it off and found that about a gallon (maybe a little more) had come out the overflow into a pan under the truck. Guess I'll try the burping first and see if that fixes the problem. If it doesn't I'm not sure where to go next. I would be interested in hearing why the adaptor plate won't work on the car motors.
