Re: Old fuel tank connectors
Nifty old Merc motor. Have you got a control box for it? If so, post a pic, I may have some spare decals to spice it up.
Personally, I would not buy a pre-made fuel line assembly. Lots of reasons why, I'll touch on some...
Many of the new low-perm fuel line assemblies are using Silverado 2000 or 3000 fuel hose (with the greyish-silver cover). Not only is that stuff ridiculously expensive, many have experienced separation of the inner low-perm liner with that particular hose.
Any pre-made assembly will come in a set length and be assembled with crimp-clamps. Makes customizing lengths, adding in fuel/water separator, replacing primer bulb when needed, etc. more difficult than it needs to be.
Instead I'd get a goodly length of Gates or Shields type B USCG approved fuel line, a Moeller low-perm primer bulb, some Sierra or OEM bayonet connectors, brass hose nipples, stainless hose clamps, and make my own assemblie(s). Likely won't cost you any more than a pre-made, and will be as customizeable as you please.