Rear wheel cylinder blew out on the way to work today

BTW, kudos for having the wits to actually use the emergency brake, downshift, etc; many people would panic and not do this. You many want to order up a dual-chamber master cylinder from a '68 model and retrofit your brakes with that. It is also a quick fix.

If you need the car operable pronto, put two plugs in your rear splitter block. You will have front brakes only- It actually works quite nicely and can get you home.