I think the fuel line was consistent rear to front on all Mopars of that era, judging from the ones I've worked on.
Try to get a measurement by whatever method:
1. Calipers/"dial indicator"
2. Reading a hose if any of the printing is visible
3. Slit a short length of 5/16 & 3/8 hose, slip it over the line and observe proper fit.