I have 2 radiator caps. Each is labeled 15# RC-15. One has the AC logo on the left and the other has the AC logo on the right. Other than that they are identical. Which one is correct for my 390/427 application????
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Re: C2 67 BB Radiator cap
Steve - If you were dealing with US postage stamps, you might have something that's worth millions, but that's not the case here. You just have a dilemma in which "original" RC15 should you use. Typically, the 1966, 1967, and later, "original" big ear RC15s have the AC logo on the left and the 15# & RC-15 on the right; but as you have found, there as some with the AC logo on the right and the 15# & RC-15 on the left. Most folks don't see many different radiator caps in their lifetime (not one of those really exciting things, if you know what I mean) so they don't have them to compare the details; but anomolies like what you see come up more often then one might expect and when you start looking for them, you'll find a number of examples. I'd say pick your posion and see if any judges notice. Have fun. Pete
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