Thread: 1966 GMC 910 V8 radiator cap
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Old October 15th, 2020, 09:40 AM
George Bongert George Bongert is offline
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Default Re: 1966 GMC 910 V8 radiator cap
Greetings IslandGMCguy!

It most likely is the 13# pressure cap. the 7# caps are for older vehicles, and have pretty much gone the way of the Dinosaurs. Other members, please correct me if I'm wrong on this one.
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