Thanks for your input, see above for part numbers etc.

I don't know what cam - still original, I think it is the 'purple' shaft? Vacuum is 18 at idle, above 12 at all cruise conditions on the primaries. I am actually running a larger spring load to get on the accel portion of the rods earlier without a flat spot. I have tried running without the spring and it makes no difference at steady state cruise speeds.

I have also run as high as 15.5 on cruise with no pinging, but as I mentioned in my other reply, the throttle tip in was poor.

Thanks again.