As mentioned in another thread, I recently purchased an '87 Turbo II that had been sitting behind a house for about a decade.

I brought the car home this weekend and I've gotten it running.
I want to replace the belts and the cooling system.

Is it recommended to use MAZDA belts, or will an aftermarket company like Gates, Dayco, or AC Delco work just as well?

The cooling system:
I fully intend to purchase a Mazda thermostat and gasket.
Which hoses should I replace. Obviously the upper and lower radiator hoses, but should I change the rest of them regardless? And do I need to buy all of these from Mazda or can I simply use ROCKAUTO?

 

I don't see any problem with using non-oem belt so long as they're the same length. The radiator hoses that I see fail the most are the molded heater hose and the small hose that goes from the top of the rear iron to the intake manifold. I recommend that you throughly flush out your old coolant as I'd wager there is a significant amount of sediment sitting in the bottom of you engine.