Thanks Joe,
I am just trying to get a feel for how important the 12"hg target might be. I am going to be real close to that number in D at my current rpm. My previous setup gave me 11.5"hg with 24 degrees initial, so I am hoping that the extra 6-8 degrees at the same rpm will get me over the 12"hg mark.

I hope to get some time this weekend to find out.