Truck: '00 Silverado 4.8 Reg.

Looking to get a brake kit for my truck, specifically a WilWood or Baer kit.
With that said, and being very brake ignorant.
It looks as though I have calipers on the front and rear, instead of drums on the rear like the newer models, meaning I would have to buy a front and rear caliper kit. Correct?

Is this a hard DIY or would I need professional assistance?
Any advice would be appreciated.