He will be hitting higher loads when he turns up the boost. I have my tables scaled out to 4.0 but I just noticed it touching 4.0 in a log the other day... I need more headroom.
It looks to me like like 4-5 degrees too much timing at high load, and that's not even including the advance table... I'm guessing that table probably adds a few more degrees beyond what's in the base timing table - am I right? If so, you should turn it down a bunch.
My current fueling and timing tables:
Note that in WOT pulls I'm actually getting more like 11.0 rather than the 11.2 shown in the table.