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Old 10-19-2021, 11:20 PM   #4
Pontiac1976
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Join Date: Oct 2015
Location: Ottawa, Ontario, Canada
Posts: 752
Re: A/c Flapper Issue and Power Window Issue

I think there is spring on the clip or cable of Vac line. If the clip is broken the vacuum may not move to a stop & let the opt sit Vac pull the open in the desired direction.
Other thing I think there's two or three vacuum balls help store Vac if they leaking or the mounting part of the line is old and cracked popped off. One in the Pass cowl vent one in the & one in the engine bay.
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1977 REG cab Long Bed with a 1984 Front Clip, 82 305 .60 over 9.0.1 flat top pistons, 4bbl, TH350, w/84 SS-intake & cam , w/ 1977 big block rad, 1975 gear box, 1984 master w/ metric fittings top & SAE fitting @ portion block, 1975 3.42 gear open diff. Duel 77-87 Factory air cleaner, duel inlet from rad support . Down sized 9' to new 8' Steel flat bed
Was a 77 454 w/308 gear. Taken out 550 lbs. up front with motor clip change.
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