I am running disk brakes on my rear 12bolt.I built these myself using D44 6lug parts all 1/2 ton.I am going to be swapping in a 14 bolt with disks.Question is are the 1/2 ton and 3/4 ton calipers the same?Don't want to go buy new calipers if I don't need to.Thanks.

yes. they are the same enough

Thought so.Thanks.