1970 RAIII TAs had a single snorkel. RAIV TAs has the dual snorkel. In 1971-72, all TAs had the dual snorkel. All 1970-72 Formula 400s and 455s without ram air also had the dual snorkel. The formula bases are easily converted to TA bases by adding the tabs for the shaker and the hose ring (for lack of a better name) on the bottom side of the passenger snorkel.
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1968 Firebird 400HO convertible
1971 Trans Am 4-speed, white/blue
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