440 pistons

I measured Wrist pin hole to top of flat of piston top and then added 1/2 of pin diameter
1.09 divided by 1/2 =.545.

Am I doing this right???

I had written on top of the box the bore and stroke of the engine they were
in and deck height. I do not remember how much I cut off the deck of block as
it was years ago but I know I cut some off it.