Im doing a drum to disk swap.

Ive collected all the parts im going to need. Even the extra shims are on the way in case i need those. The only things im wondering about now are the bolts. Are any of the bolts from my drums reusable. Ive been looking at some diagrams and im a bit confused. first of all, are the bolts that hold the backing plate to the axle (bolt numer 48 in this picture http://shbox.com/1/rr_disc.jpg ) the same as those used for holding the drum on. Will i need new bolts for this? If so what size?

Bolt number 45 in that same picture: http://shbox.com/1/rear_caliper.jpg is that the same bolt that holds the caliper together as seen here labeled as number 2. In other words is this the bolt the caliper slides back and forth on, as well as the bolt that holds it to the backing plate?

its a little confusing because i dont actually have the parts sitting here to look at. they're at home and im away at school. im planning on doing the swap soon and im just trying to gather materials.