brake questions for full size Chev C1500

I need to upgrade my brakes on my 1991 Chev C1500 extended cab short box. The truck has Power slot rotors on the front with Hawk pads and drum on the rear. Thinking of doing just a Hydroboost set up with the brakes I have or doing four wheel disks and seeing if that helps or do the four wheel disk with Hydroboost set up. Those with the hydroboost set up what have you done that will work great.

get a disc brake rear end out of a early 90s caprice or impala (mod it to fit your truck) then just run a adjustable brake proportioning valve. . . . il be doing this swap to my 94 4dr s/b in a few weeks (also the impala caprice rear ends are a few inches shorter than the stock drum truck rear end)