Phil, no sweat on the heads up. Sorry I couldn't check it for you right then as we were in the middle of packing boxes and moving stuff into storage in preparation for our upcoming move.

I really didn't take a close look at the data or give this any thought after Stretch posted his copy of the chart. Indeed, it appears that 16 ~ 17 degrees at the crank on the 2mm test would be just in spec, as Stretch has pointed out. The 2 degree (at cam) key would improve your cam timing a bit, and wouldn't be a total waste of time, perhaps. But also can see how leaving it as-is would be fine.

Why are the specified ranges so much larger for this group of cams?

Stretch, I am curious to hear more about how the smaller offset keys don't actually adjust how we want them to. When I went through this on the '74 the cam timing was behind the outer spec by about 3.5 degrees at the crank. I installed the 2 degree (at cam) key and it brought cam timing up about 4 degrees (at crank), to just within the specified range.