Steve
Its my belief the DeTomaso/Ford folks designed the Pantera radiator as a dual pass style to give the coolant the same amount of dwell time in the small Pantera radiator that it has in a larger single pass radiator found in Mustangs and Torinos. Different core configurations may make small differences in dwell time, but as long as the radiator is a dual pass design I would expect it to function fine (or to put it another way, it will still be in the ball park).
I'd be interested in knowing what Fluidyne has to say, why they changed the core. Has anybody spoken with Fluidyne?
-G
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