Rear brake conv.to disc
 

I want to replace my rear brakes to disc on my 1985 Chevrolet 3/4 ton 4x4 truck
Is this feasible ?

Its a very expensive procedure, between 600 and 1000 dollars depending on where and what you buy. Wouldn't be worth it (to me) unless you absolutely need the extra stopping power. The kits are self explanatory and simple so its up to you boss