My truck has a pretty crummy. weak, and jumpy idle (78 f100, with 300), and the timing seems to jump all over the place when idling. been to several different mechanics, and they always point to the carb. Well, been through three carbs, new egr plate, replaced intake/exhaust gasket, and have replaced all vacuum lines. Oh, did plugs, wires, cap, rotor too. Runs great with the foot on the gas, but at idle it makes me miserable.

I'm thinking that my issue is the distributor itself, and If I replace it my deisling issues, weak vacuum when braking issue with go away.

Does anyone think that I am on the right track? And if I am, how hard its it to do myself. I am not bad with a wrench, I've done brakes, suspension, and even replaced a rear end, but some of the more tricky repairs may be beyond me.

Any guides out there? I do have the haynes manual.