400 4 speed 1970 GTO engine codes:
WT standard L-78 large value 400
WS optional L-74 Ram Air III, large valves with the big exhaust manifolds
WW optional L-67 Ram Air IV, large valves with big exhaust manifolds, round exhaust ports, aluminum intake with iron crossover- not available with a/c
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1970 Lucerne Blue Firebird Trans Am, deluxe blue interior. Original Ram Air III, M-21, 3.73. Being built as a 4" stroke "434" with SR 614 Ram Air IV heads
1972+ Lucerne Blue 4-door hardtop "what if" T-41 Le Mans Sport GT/Grand Am concepts. Equipped with future 3" journal "455 HO"/"what if" prototype "SD 455".
What if GM had continued production of the 1970-72 GM A body somewhere in the southern hemisphere?
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