Hey 3B,
I got out there and did a little more looking....I wasn't seeing any countersunk screws...but again there is still a lot of gunk on them, trying to get that cleaned off.

If I had the countersunk screws, where should they be? On the flange with the lug bolts or someplace else?

Also, you talk about an outboard mount style drum and an inboard mount style drum...is there an easy way to tell the difference?

Thanks,