63 Valiant disc brake swap kits?

Wheels already bumped to 14" Cragars, and I'm trying to keep 14". Relatively stock/mild 170, just comfy, reliable, safe tooling around. If I do spindle upgrade, I can keep SBP, right?

Not planning to get much deeper (like, getting new springs and shocks, yes, but keeping 7 1/4 rear), but let me know anything else it'd be a good idea to upgrade, while I'm tearing into it!

Thanks,
Steve