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1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck
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1975 Highboy Radiator

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Old Jun 16, 2026 | 08:10 AM
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1975 Highboy Radiator

Were all the highboys provided with the big 4" deep radiators, or did they also have the smaller ones? Do the 2-3/4" radiators mount recessed into the core support or stick out like the 4" ones?

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Old Jun 16, 2026 | 08:27 AM
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Just like the rest of the model line it depended on the options. if you had A/C or the HD cooling you got the big radiator.

The standard radiator will mount the same way it's just thinner.
 
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Old Jun 16, 2026 | 08:52 AM
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If the truck had AC, wouldn't there be the big box inside the engine bay, passenger fire wall?
 
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Old Jun 16, 2026 | 09:37 AM
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Unless it was removed. and you'd have the dash vents of course.

Or you could have the HD cooling with a bigger radiator.

As always the best way to know everything about a Ford is to get the Marti Report.
 
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