340 Upper Rad Hose Too Short

I have a 1969 340 with the stock cast intake and what I believe is the correct rad (#2949-066). However, the upper rad hose that my local supplier lists comes up about an inch short. It will, reach but just barely. I,m sure that the movement from the engine tourqe will pull it off when I put my foot into it. Can anyone recommend a hose that will overcome this problem? Thanks for any input.......