Today's Observations

[CaliforniaBorn36]

Maybe, temporarily at least, hang a cheap plastic bottle off the end of your overflow tube and see how much coolant is being pushed out while driving. On my 36, if the coolant is right at the top of the tubes it will push a bit out when it is driven. Let the radiator find it's level. If the Battery box under the floor is wet with coolant after a drive, it may be leaking elsewhere, I can't imagine losing enough to get the battery box wet considering the overflow is on the front side of the radiator