Oh, and that's a good point for @19Dart74 - I know I've already said it, but there are 2 versions of the 10" front drums. So be sure you're not getting '67-72 10" front drums and hubs, they will not fit your spindles. Those are 10x2.25".
The '73-76 10" front drums/hubs use a different front spindle than the earlier version, and have larger wheel bearings. So, your 10" drum/hub assembly has to be '73-76, and they will be 10x2.5" drums. Not to be confused with the BBP 10x2.5" rear drums.
On the bright side, you have large ball joint upper control arms, so, if you give up trying to find drums and hubs in serviceable condition your disk brake swap will be easier.
