They should be a rear mount. Look at your present calipers, they should be mounted to the rear of center. I just did new calipers, pads, one wheel cylinder, shoes, drum hardware and steel brake lines on my '88 a couple of weeks ago. Everything came to around $100.
1997 TJ, 4" ProComp, 33x12.5x15 Firestone Destination MT, JKS Quicker disconnects
sold-1988 YJ, 4.2L, 2.5" OME, .75" boomerangs, 33x12.5x15 Cooper Discoverers, Herc'd,Nuttered, TeamRush'd
2001 WJ stock DD, 4.0l, Select-Trac
Most good stories start out "Y'all ain't gonna believe this ****...."