Yeah, I found out the same thing on the lower hose. Right now I'm using a flex hose on the lower. The upper hose is for a 96 Durango. I took a shot in the dark and ordered a radiator for the 96 Durango to see how it would fit the 68 radiator support. I had to drill 2 holes in the original metal pan under the 68 radiator for two registers to drop into (7/8", I think). I also drilled two holes in the radiator support for the two top bolts. It fits perfectly! Most likely the lower hose for the Durango would fit.
It's a possibility a lower hose for Grand Cherokee will fit. I bought a 98 Grand Cherokee today and got a bottom radiator hose from it.I'll check to see if it fits. The Grand Cherokee has an electric fan and has a plastic sleeve in the lower hose for the fan relay sensor. I'm sure it can be made to fit. I'm going to fab the GC electric fan to fit the Barracuda.