I agree that Box 77 is manual transmission information, as option "778" is the M21 close ratio trans, but "777" does not appear in my GTO literature (which makes sense if it is specific to 6 cylinder offerings).
K
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'63 LeMans Convertible
'63 Grand Prix
'65 GTO - original, unrestored, Dad was original owner, 5000 original mile Royal Pontiac factory racer
'74 Chevelle - original owner, 9.85 @ 136 mph best http://www.superchevy.com/features/s...hevy-chevelle/
My Pontiac Story: http://forums.maxperformanceinc.com/...d.php?t=560524
"Intro from an old Assembly Plant Guy":http://67-72chevytrucks.com/vboard/s...d.php?t=342926
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