14 bolt conversion to disc questions/options

[Asshat]

Not sure if this is the best place, but I am looking for info on disc brake conversion on a GM 14 bolt, 8 lug, semi float rear end. I just can’t seem to get the drum brakes right, so I’m thinking of a conversion.

Can I buy just the bracket for the calipers and rotor, or do I need to buy a kit?

Are there any other options for a parking brake? All the kits want to add $200 for the parking brake calipers. Are there parking brake calipers from other cars that would work?

When’d did the rear ends (3/4 ton) start getting disc brakes? 1999?

Any help would be greatly appreciated. I’m sure there must be somebody out there that has done this.