Just Purchased Virgin 340 Short - What to do with Pistons

cudaracer said
CC's are 65, and the piston are in the bore by 0.07"

Can anyone calculate my CR, assuming deck height is typical

Got a picture of the top of the pistons?
I'm kindof ignorant here, but shouldn't stock '71 pistons be above the deck about .045?
And 65 cc is close to the min, would that suggest the heads have been milled?