Many of the large 2G carbs have holes in the throttle plates as the factory did on all automatic transmission cars. If yours does have those holes, that explains the high idle. Also can work with you on idle circuit parameters.
PM me if you need throttle plates without holes--I have plenty. Will cost you shipping only.
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BONESTOCK GOATS
'64 GTO Tripower Hardtop (Wife's Car)
'64 GTO Tripower Post Coupe (My Car)
'99 Bonneville SE Sedan
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