If you can do a bunch of the fixin' up yourself, putting $5K into the '65 will get you a pretty nice ride. If you don't know how to do stuff, pick up a wrench and learn! You've always got people here to get you out of a jam. If it's been garaged much of its life, I'd think you could drive it as you go along with the fixing and tinkering.
Learn to be frugal and $5k will go a long way. Get used parts from the swap meet here, still some good deals on ebay, and plenty of repro and remanufactured stuff online and even Autozone, Napa, etc. Parts prices vary considerably depending where you're shopping. Be an educated consumer and you'll have a great truck without breaking the bank.
-David
