Thanks, yes it was a strange spot for sure. Found another sheet hog ringed to the framework of the back seat bottom when I pulled it the other day. Haven't been able to cut those yet to see what info it contains. Want to keep all the original paperwork I can as this is the first time I've found the build sheet in any Pontiac I've owned. Even though I'm going to replace the rearend I am still curious about the gearing, but may pull the cover off the housing and change out the grease as I'm starting to get some backlash in the gears. I'm surprised the 7.5 has held up this long behind a 400 and now 350 Pontiac.
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1971 GTO,72 400, stock bottom end, 670 heads, Lunati BMII cam, headers, iron intake Q-jet, four speed. Best 60 ft 1.806in 2004. Best 1/8th mile e.t. 8.46 with 3.55 open rear
85 Grand Prix, 70 400, casting 62 heads stock rebuild, Turbo 350 trans 78 800 cfm Q-jet modified as per Cliff Ruggles book.
87 F350 6.9 4 speed dually
A poor man has poor ways.
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