Brake ? Clip On VS. Bolt On Calipers

[Big Kev-O]

I plan on using drop spindles to lower my 68 C20 8 lug GMC and convert to disc brakes. I am thinking of using Chassis Tech 1971-1991 C20 3" drop spindles. I can choose either "clip on caliper" or "bolt on caliper" spindles. The plan is to use 71 discs, calipers, ball joints, ect.

My question is what type of calipers are on a 71 C20 clip on Or bolt on?

BTW:The reason for ussing Chassis Tech spindles is to avoid spending $900+ on the 1963-70 C20 Front brake conversion kit from POL.

Thank You!