Disc brakes

And they work awesomely on my streeter 68 FormulaS clone. My kit is from a 70 Duster. That makes the parts 45 years old. Except the teflon-lined/braided hoses, which are 15 yrs old. And the newer pads.

As to the kit; This is what it consists of: everything between the control arms, the matching Proportioning valve, and possibly smaller rear wheel cylinders and/or at least 10 inch rear brakes, the master cylinder/booster.
Between the arms is; the spindles,the rotors with hubs,bearings,washers spindle-nuts and studs,the calipers,hoses, splash-shields, and lower BJs.
If you dont have a sway bar, but would like to run one; you will need to get one that fits your K-member. There is one for the 72 and older Ks, and a different one for the 74 and newer Ks. I mention this because the sway bar mounting tabs are in different places on the lower control arms(LCAs),between these two styles, so if your LCAs dont have tabs, you might as well order(used) the correct LCAs that you may need. It is also possible to fab up some tabs yourself, if you are handy with a welder,etc.
While its possible to reuse your dual manual m/c(remove the residual valve to the front brake system), its highly recommended to swap it out for the correct dual disc-brake m/c.The chambers are sized differently,in addition to the rear-brake-only R-valve. The bore sizes are also different. And its also advisable to at least consider a booster. With the loss of the self-energizing drum brake system, quite a bit more leg-power is required, to do the same stops as before.
I think thats everything.