I can't really remember without looking at the VE table, but I usually monitor the fuel trims at idle, then go over to the left of the VE table, see what stock is, and usually 4 columns will cover it. Add/subtract until things level out. But I've got a little easier way to tune the 42.5's than you do with your 65's.

Sorry, I'm not a whole lot of help. I can't hardly describe what I do to tune the car without sounding like a fool.