The lower hose I used - stock 350 water pump, vette radiator - is actually the upper hose for a mid-nineties 5.0 F-150. As described in the JTR engine swap book, you cut the hose in the center to clock it so it will line up right and splice it together with a hose coupler - I used metal pipe, double hose clamped. Then a reducer is used on the radiator end to get the hose diameter down to match the neck. Couplers and reducers should be available at most parts stores, mine came from O'reilly's. This really sounds like a cobbled-up and cheesy deal, but it works perfectly. I can send pics if u like, or check out the JTR book.
I agree with Randy on splicing the hose together with metal pipe. I used the plastic radiator hose repair kit as it's called, the one JTR recommends, I had to seperate the hoses once and the plastic looked like it was starting to distort.
I went to Ace hardware and got a barbed metal hose splice for half the cost of the plastic one.