Purdy and Jackson: Original radiator, but completely re-cored with extra tubes. Only a couple thousand miles on it. I have always run a mixture of antifreeze and water so I don't believe it is rust/plugging issue. The completely rebuilt engine has less than 5000 miles. I will again re-torque the head. I had done that a bunch of times though, and the last couple I didn't get any more on them.
Purdy: I have enjoyed your posts over the years. Thx for a response. I have heard of the water pump fins being ground. I did not do that. It is a leakless from Snyders. I have always been suspicious of this though. Is it possible that the fins are only an issue when pulling a hill and not at higher rpm or at any other time? My common sense says "no", but as Samuel Clement said "Common sense isn't so common anymore"!
Thanks! Keep it comin'!