12-08-2023, 09:02 PM

68 Firebird 68 Firebird is offline

Chief Ponti-yacker

Join Date: Apr 2001

Location: Colonia NJ USA

Posts: 994

Question on TH400 modulator hard line

Did the factory vacuum modulator line have an orifice at carb
side connection.

And if so what was purpose?

Thanks
Gerry

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1968 Firebird 400, 068 cam, TH400 & 13" Continental Converter, Auburn posi with 3:08 factory gears, Cliff's Q-jet resting on a 68 factory iron intake, GM HEI and Ram Air pans and RARE Long Branch Manifolds

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