Hole on the rear of the air cleaner shroud is where the PCV valve was connected. On engines using a little oil, the air cleaner would have an oil smudge at it's location on the outside.
The Quadrajet has a metallic fuel filter at the fuel inlet connection...where the steel hose connects from the fuel pump. Changed that??????
The Distributor has mechanical advance and may be frozen. No MA with acceleration floods the engine as it can't setup the explosion fast enough to occur before the piston position is ready for it......exactly your mentioned problem! Pop the points mounting plate and the arms are right there....as I recall...1971 400 cu in big block, Chevy station wagon. I had to have that thing for some reason. Went to Steakley Chev. in Dallas to buy one. Tried 3 and all had the same problem....small inlet in the air intake shroud supposedly feeding air to the QJ. Would have done a lot better with a Suburban but they weren't all that great back then with only one rear door...a 3 door, not 4 like the station wagon....and hindsight is 20-20.
QJs need air to run right. Big problem with OEMS was that stupid air filter shroud with the tiny little hole where air was supposed to enter. Flipping the lid upside down on the shroud made a tremendous difference in acceleration ability but was noisy when you "got on it"......reason Detroit designed the stupid AC shroud.....opinion.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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