All Pontiac Tri-Power carbs uses #70086xx 60° Approach (Long Taper) jets, except 1957-58 end carbs and 1965 421 A/T center carbs.
1957-58 end carbs and 1965 421 A/T center carbs uses #70026xx 60° Approach (Short Taper) jets.
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1966 GTO Tri-Power
1970 GTO TheJudge
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