I haven't measured them but they have about 1/16th of meat above the rivet heads and maybe 3/32" furthur down the shoe. How thick is a new shoe, I'm thinking maybe 1/4"?
The front drum is fairly smooth but the rear is a little grooved and could use a little clean-up. Post up and advise, thanks. Oh and thanks Jon for the drill out tips, I used the same technique and it worked faster than all the other junk I was trying.
LR wheel front shoe:

LR wheel rear shoe:


Also on the front wheel cylender only one of the pistons move outward with pedal pressure, does this mean it's bad?