Or, if it is the original engine, and someone decided to "fix" the fuel injection problems, you're still looking at some headaches. Unless your example has a good excuse, it was fuel-injected at one time. (Ford went EFI on all of its truck engines starting in '87, with some examples like the 302 even prior). Look under your dash, above the accelerator, just to check if there's a computer mounted there. If so, I'll bet it's pretty bored. Also, if your truck still has exhaust manifolds, check to see if there's an oxygen sensor living in one of them with the wire cut. You can try to sort through things and keep it carbureted, or start researching the task of reinstalling EFI. You'll probably be okay if you don't have to pass an emissions check, but if so, they'll never let the carb fly. The brittle plastic vacuum lines are available, I believe, although you can also use standard rubber vacuum hoses with the appropriate emissions connectors, which are available in the aftermarket parts stores. You may try looking in NAPA or Pep Boys. Good luck!