Just my
but be careful running that low of timing as it will cause detonation which leads to a whole host of bottom end problems. I'm not sure what you plan on running for total boost in the end but I would say start out at 10 to 12 degrees below what your total is now as a starting point and read the plugs from there.
Completely different combo I know but my base timing is 36 degrees and at full boost of 45lbs it's at 27.5 degrees.