I did the rear brake conversion using the 1996 Cadillac Eldorado. Went to the local you pick got 2 passenger side calipers with the Emergency Brake bracket. Easy swap with no need to swap cables. Make sure you get the springs on the Eldorado EB cable. They are different.
Used the you pick yard calipers at Advanced Auto as they were running a promotion.
Remember passenger side only.
Brake hose also from Eldorado, but I can't remember which side as one was longer then the other.
Didn't do the swap because of increased stopping power I did to avoid brake rattle.
Not my idea, McReatta did it and passed it on to me.