I am wanting to do the same swop my self.From what I have read and seen the rear axle will swop out.May hve to get a joint like my 85 bronce for the rear.Where it has 9in caps on the axle side a 8.8 caps on the driveshaft side.The front you will need all the suspion parts out of the 78 to put under your 94.You can find and buy a after market track bar bracket on line.(track bar, radus arms and frame mounts,tie rods).This I know fro sure.