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Old 05-03-2021, 01:20 PM   #4
vin63
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Join Date: Apr 2008
Location: Chino Hills, CA
Posts: 2,261
Re: 66 big back window gasket bulge

The couple of times that I helped friends with that type of bulge has been that the bead lock strip was not completely seated or started to pull away and it allowed the seal to distort.
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1963 C-10: Deluxe-optioned cab, shortbed, fleetside
Pontiac 462 ci, Kauffman D-Port alum. heads
4L80E, narrowed sheetmetal Ford 9-inch
Tubular front and rear suspension
Custom 6-piston front disc and 4-piston rear disc brakes
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