If you put a search on the board you will find a "in depth" discussion on
this subject. I'll go from memory now>
The position for the inlet for fuel for stepsides changed from year to year; thus the length/turns on the inlet hose are not the same and will not work for ALL stepsides.
IIRC the 77 and 78 where the same so the hoses are unique for those years. No one AFAIK(Could have changed) makes one. The one I bought shown in the picture comes out 2" short and will not work but may work for other years.
BTW: If you think you could just get a "universal" radiator hose and use it is a bad idea. Radiator hoses where designed to carry water/anti-freeze and
not fuel. If used for fuel it COULD brake the rubber off in small pieces and go to the fuel tank then the carburetor which is not good. Larry