Vehicle: 1992 Jeep Wrangler
Booster: Stock YJ
Brake Lines: Stock YJ
Master Cylinder: 1968 Corvette, 350, power disks
Combination valve: GM all disk
Front Calipers: 3/4 ton GM calipers from a 1975-1980 K-10/K-20 era truck
Rear Calipers: ½ Ton 79-85 (76-78;82/84) El Dorado rear calipers.
Tire: 38.5x11
Wheels: 15x10

Going to replace the rear cadi calipers and install front calipers in the rear instead. I currently have 3/4 ton GM calipers from a 1975-1980 K-10/K-20 truck in the front. Debating keeping that same calipers on all 4 wheels or moving my front calipers to the rear and increasing the stopping power up front with a new caliper. What are my options for front GM calipers using the same mounting bracket on 15" rims?

your only options are chevy 1/3 ton or 3/4 ton calipers from that era and if your running 8 lug with the big rotors you have to grind either one for 15s

Echoing what Chevyboy said. The Chevy 1/2 tons and 3/4 tons used the same calipers just with different diameter rotors. Those and the Eldo calipers you already have on the rear are the only ones which fit the brackets you have.

If you really need increased stopping power consider a ceramic brake pad instead. A crossdrilled/vented rotor may also help depending on if heat is an issue.

I Also Recommend The Rear Caddy Calipers, But There Is An Upgraded Ft Caliper--80 Mm--from Stainless Steel Brake Corp--ssbrakes.com--i'm Running These On My 1/2 Ton Dana 44 With Their Rear Conversion To 48 Mm Corvette Calipers, And What A Difference!! Oh, I Also Tun Gm Ceramic Ft Pads--better Bite--out Stops My Brother's Mustang--he Hates It!! Reasonable Price, Only Upgrades I Found After Apprx 65 Site Search. Good Luck!! Db