Need rad hose help - any ideas??

[JoetheMobster]

Okay guys, I've seen these floating around in the past few months, and have tried to copy down the information I saw, onto paper - knowing that I would have to deal with it sooner or later. I am looking to replace the lower radiator hose on my truck, but as posted before, this is starting to be a headache! My truck is a 1971 GMC ½ ton with the 5.7L 350. I've copied down a number from an earlier post, checked it out on the napa auto parts website, and sure enough, the same part/part number came up.
(part#PBH4207463) or:

http://www.napaonline.com/cgi-bin/nc...grpid=80213817

Anyway, so I go and get this part, as the angles of the hose seem to be correct, and as mentioned in an earlier post, with some cutting, it should fit. Well in my application it will not! The frame is getting in the way. What I did was then take the hose off the truck, brought it to the parts store, and they said they have no idea what the hose could be off of?? (their computer and books say the same part mentioned above) As far as I can measure, it looks to be 1 5/8" inside diameter, but it just may be stretched out as the hose is very old!!

My question is, do you recognize this hose??: (it's the one off my truck)