Yes. That VCV probably leaks and doesn't work anyway. But, then you'll need a vacuum source for the dizzy, unless you have the original vacuum retard dizzy, in which case forget about that vacuum line.
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Yes. That VCV probably leaks and doesn't work anyway. But, then you'll need a vacuum source for the dizzy, unless you have the original vacuum retard dizzy, in which case forget about that vacuum line.
You really can't ask for much more. Those Late F engines, theoretically, with the improved oiling, should be the longest lived of the F series. The head studs are longer too, a one-year-only thing. Have you adjusted the valves yet?Basically, the conclusion is this f155 has some miles on her, but still runs well, doesn’t leak or smoke. Took her for a drive and she cruises at 65, no problem.
I'm pretty sure that you don't have a vacuum secondary on that carb. That diaphragm there is for the "throttle positioner", which, I think, was to slow how quickly the throttle closed when you took your foot off the gas. I also think it was part of the smog stuff so I took mine off and capped that port. That port just might work for a vacuum advance dizzy. There is another spot at the base of the carb for the dizzy vacuum that some carbs have and you can have added to yours. Ported vacuum is weird and I don't fully understand it but it's not like manifold vacuum, it's weaker and comes on at weird times. Won't hurt to give it a try.and the vacuum secondary on the carb?