I believe the only way to correctly ID which radiator the factory installed is to reference the Build Sheet. The 2 numbers under "RAD" indicates the radiator part #
(line 3 on my 70 dart 340 build sheet)
Then look up in factory parts manual and/or one of Govier books
ex build sheet 45 = 2998945 = 70 340 both trans with N51 max cooling package
This is a 3 core radiator
78 = 2998978 = 70 340 both trans
This is a 2 core radiator
These are the only 340 radiators offered on 1970 A bodies
Above info from Govier books and there is no listing for a 70 340 with a/c
I have both radiators and info is correct
Anyone with more info can add to this
