Biggest cam in stock piston 440

I know I will have to check for clearance, but I was wondering what cams you have gotten to fit in a stock piston, (no valve relief) 440? These are the older TRW #2266's, I think the newer ones with the same # sit lower. I have 906's with 2.14"/1.88" valves. I am looking at a Bullit grind, # 4038694, that is 256/264 degrees @ .050". with .552/572" lift minus the .016" lash. I will rent the piston notching tool, but it sure would be sweet if I didn't have to. Thanks.