To Stroke, or not to Stroke

Me too, My blk checked out good, now I have a question.
It has up to 12000 tapper in one cylinder, most are lower around 8000. If I go .30 over, am I ordering .30 over 440 or .30 over 400?They are wanting to know how much to punch it out to and I am not sure. What do you guys think?
The crank is going to get sized down to the 400 main size and polished and balanced.
Small Blk bought the equipment so we will start balancing everything else ourselves. This is alot of fun, I just hope it doesn't blow up in my face!!