318 with 360 crank-another peeing contest

The stroke difference is .270 but the piston only comes up half of that. The other half is on the bottom of the travel. Figuring that most teens have a
-.060 below deck piston or so then the piston will come out of the hole about .070 or less. The first 340's came out .010 if I remember correctly and had a 10.5 CR. The more input on this post the better.

Thanks