Hub drilling

Problem is the center register on that small bolt pattern hub is smaller than the larger bolt pattern (LBP). So a LBP drum won't center properly.

If you replace these, you'll have to drill out a set of SBP drums. And same with rear drums too.

Probably don't drive this everyday so not a huge rush.

Might find a conversion at Spring Fling show/swap in April. I know McKellar's from Bakersfield will be there with new disk and axle setups (for 8 3/4). Used disk conversions are usually there for sale and might find a used large bolt 7 1/4 if that's an option.
Probably shouldn't be changing the subject here but I see disc brake conversion kits all over ebay.... Are the used sets from swap meets just less expensive or have people had issues with the ebay kits. I did a quick search but didn't see any mention.