Need to know what kind of hubs I can use?

Usually. But then there’s the Wilwood disk conversions that have the 5x4” pattern with 1/2” studs. Or any of the new kits like Pirate Jack that have the same thing, BBP rotors/hubs set up with the 5x4” pattern and 1/2” studs.

Drums are usually a pretty safe bet, but you never know. The 7/16” studs are getting hard to find, and if your hubs were sketchy/loose you might be able to tighten them up by using larger studs. Obviously not without its issues too, but I would still measure the pattern.
Absolutely