Darn! Your right. I was thinking in '73??? the valve went to a 1.88. No?
OK, more coffee...no sleep, no wait.coffee sleoffee, coffselp, plz enk. er....TTYL! Work soon. Midnight comes fast sometimes.
I think the 1.88s came on the scene in early seventies....my '72 came stock with J heads and 1.88s and my '69 340 came with X heads and 2.02s so I'm not sure exactly when the smaller valves came in......only that it was earlier than '72.