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I've got a couple of good reference books that list the valve sizes for your head at 2.02/1.55. No reference is made about larger valves later in production. The confusion my be that some of the standard 428's used the same head. The CJ head had valves of 2.08/1.65. I'm sure if Jeff has other info he'll let you know.

65 FB "J" 302 lots of mods. 94 GT K&N only.
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