I understand the different wall thickness. However, it would seem that the block bore, unless tinkered with, would be the same for 3 1/8 to 3 1/4 sleeves.
Looking at a sleeve and piston kit for 3 1/4 overbore - stepped piston - 3.436 Lower Sleeve Diameter. One of my blocks currently has 3 1/4 pistons. Thus I'm "assuming" that lower sleeve diameter is ~ 3.436. If I'm assuming correctly, what should be the largest diameter of the puck to pull the sleeve and clear the block?