Originally Posted by farna
70s Corvettes have the radiator at a steep angle in front, and there have been mid engine cars with the radiator installed flat in the back. I've seen a couple truck rods with the radiator flat in the back. The flat mounting won't affect cooling as long as there is adequate air flow. The mounting just effects filling, and that problem has been solved. There should be no more problems with it as is. You might want to let it idle for 3-4 hours while you watch the temp gauge just to make sure -- wouldn't want to find out there is a problem in the middle of a parade!
Thanks Farna, my plan this weekend is to let it sit idling and see if the cooling system can keep up. If the system can't handle the heat I will look at alternative locations for the radiator. I need to commit to the position before the cart gets taken apart to get ready for paint.
BTW One of my first cars was a Rambler wagon, a '63 is on my list of cars I want to own again.