the 1967-1969 Firebird's which came with 400cid engines were actually called a 'Firebird 400';
The model name changed for 1970 to 'Firebird Formula 400' (ordering info still called it a 'Firebird 400');
Then the model name again changed in 1971 to 'Firebird Formula', with engine size being shown on the fender badges through to 1975, and fender decals which just stated 'Formula' for 1976.
You could say that your 1971-1974* car was a "Formula 455", even though technically the model was a 'Firebird Formula'.
* = model engine option engines were:
1970: 400 (only)
1971: 350 (base), 400, 455, 455HO (optional)
1972: 350 (base), 400, 455HO (optional)
1973: 350 (base), 400, 455, 455SD (optional)
1974: 350 (base), 400, 455, 455SD (optional)
1975: 350 (base), 400 (optional)
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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)
Last edited by unruhjonny; 11-09-2018 at 06:14 PM.
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