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for that year it ought to have something setup, whether it uses it or not is most often fuel pressure of the current system, and even then, it could get a squirt after letting off throttle (weak or string sytem judges it theough pressure relief). Injecteds have huge pressure, seemingly use it at all times. I got an old carb that chooses it with a 3psi system, it is not only good to have, it may be law for injecteds. these functions go by generations, years of vehicles, all makes more tha indivudual. an old sube is a case of one car setup for everything as an example, and they chose a reutrn even for thier little carbs, complete with a gas collecting surge cotank in the back hidden, mostly for turbomodels. Dig at the trucks system, and learn what else came in that body, it is fun surprises sometimes...stuff may be there not even utilized.
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