I see you got the pictures working!
That fourth picture shows a plug, and that is the correct for 1972 fuel bowl casting number, so that tells me this carb started it's life as any of the following:
7042262 - 455/auto (A & G body)
7042264 - 400/auto (F, A & G body)
7042272 - 400/auto (full sized)
7042274 - 455/auto (full sized)
7042276 - 455/auto (full sized; altitude)
7042278 - 400/auto (full sized; altitude)
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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.
1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
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