The numbers i gave are for the three different 1966 Tri-Power center carbs.
They all uses their own throttle valves.
A/T 7026074 uses valves with .055" bypass air holes, M/T 7026075 are solid, no bypass air or California M/T 7036175 uses .096" bypass air holes.
HTH
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1966 GTO Tri-Power
1970 GTO TheJudge
http://www.poci.org/
http://gtoaa.org/
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