72 Duster Resurrection

Next step I need some guidance on:

The brakes are completely shot. Standing on them while pulling the e-brake will kind of sort of slow the car down....

So here are the options I see from doing research. Anyone care to vote for their recommendation?

1. Rebuild current drum brakes. Flush, refill fluid, change pads, etc.
2. Find a donor car (73' and up right?) with disk brakes and swap it onto my car. Ive seen some write ups for this...
3. Get a nice shiny new disk brake conversion kit. Will this make me go to a new bolt battern for my tires? I'd prefer to not have to buy new rims...

Please cast your vote! I would prefer the most cost effective brake option. Did I mention I am pretty broke?