Timing curve for my big-cam 451?

Dr C,
Congrats on using MVA. Very smart & you are also smart enough to realise that more than the current 27* of idle timing will probably be beneficial.
Not quite following where the 27* idle comes from because you say the VA doesn't pull in at idle? Does the extra timing come from the centri curve starting early?
I am surprised the VA does not pull in with 8" of vac. Admittedly have not worked with many adj Chrys VA units but those on GM HEIs will generally work with 5-6" of vac.