Re: door differences
The door with the hole at the vent window is a 72. If you fill the hole you will need to make sure of the brace in the area, (look in your 69 door as it will have a flat piece of sheet metal that connects the two halves of the door).
67-71 doors had cracking problems in the connection allowing the door to spread so the screw was added in 72 to cure the problem.
Jim
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1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end
1965 Impala SS 400 sbc, Muncie rock crusher
1966 Impala SS 396 bbc, TH 400
1969 El Camino, 350 sbc, TH 350
1971 Snowplow built on a Blazer frame
1972 GMC Short bed, stepside, TH 400, 427 BBC
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