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P.S. I read your link above. A good explanation of how it works. But the key here is how that particular distributor you have ( I probably have the same one, 1979 mustang II?) was originally setup. If you re-read the article, you will see he mentions when they came out with ported vacuum, they recalibrated the distributor curve for more advance. So sometimes unless you get into the distributor and start modifying it, you have to stick with how it was hooked up originally for it to work correctly. Hooking a dist curved for ported vacuum use to manifold vacuum, may be where I am getting the high idle problems. See what you get when you hook yours up, there is no harm in experimenting with it.Found this on the web.
Explanation makes sense. Think I'll hook up my vacuum advance to manifold vacuum.
Years ago I had a 2.8. I put a 2 barrel Holly on it and got a little more power.Ended up getting the distributor from O'rielly, Advanced showed it online as in stock, but couldn't order it.
I sourced all the rest from Rock Auto since I couldn't find any coupons to match their pricing including shipping online.
Also one of our members has an a Pinto 2.8 Carb, I'm going to get it from him and hopefully have this rig running right!