Drum to Disc MC Issues

Dadsbee is correct. The caliper pistons only move a few thousands of an inch.The extra volume is for pad wear and you'll probably never need it unless it's a daily driven for a few years. The boot is a nice touch, i'd use it. I have drilled
and tapped a master for that very reason. It only takes a few minutes.
Thanks! Dadsbee didn’t bother to really read my OP or he would have noticed I already pulled the original MC and bought a new one. His post wasn’t really helpful. Only his opinion - which I respect. Everyone has one.

If I’m sure my drill and tap will be accurate, I may just do that! Thanks.