Spindle question

[jtm311]

I have read this forum on the upgrade to c5 brakes, the good news is I already have the drum hubs on my car. My question is with currently having a spindle from drum brakes do you also have to change to a disc brake spindle? My thought is you need the disc brake spindle which has the mount for calipers.

Or does the drum spindle have this mount also?

If I need a new spindle I can just go right to the 2" drop version.

Thanks,
john