I would carefully consider piston(dish) availability & even possibilty in the choice for how much stroke
adding stroke puts a real Whack on the static CR & Scott's largest chambers are 59.5cc
depending upon piston CH it may not even be possible to create a dish large enough to manage DCR ?
as far as stroke in general, the stock block may not have long enough bores toward the bottoms IMO
it's a delicate dance to get a piston short enough(ring pack & dish) to use a long enough rod to keep the piston from coming out the bottom of the bore at BDC
I have heard about a serious custom piston that incorporated a 'trough' around a clearance bump in the piston dome for the top of the rod, probably not made from a 'stock piston blank' but from billet block
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