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Bill Cilker · 04-20-2021, 02:43 PM

Freddie
There are basically 3 different manifolds, one with our a vacuum hole (BOP-6/29), one with a high vacuum hole (7/29-7/30) and the last with a lower vacuum hole (7/30-EOP).

Also, be careful that the thickness of the mounting flange is correct. When an intake manifold is bolted to a exhaust manifold, they should be machined so that the mounting surface is flat across them.

04-20-2021, 02:43 PM	#8
Bill Cilker Senior Member Join Date: Apr 2011 Location: Milpitas, CA Posts: 398	Re: Original Intake Manifold Freddie There are basically 3 different manifolds, one with our a vacuum hole (BOP-6/29), one with a high vacuum hole (7/29-7/30) and the last with a lower vacuum hole (7/30-EOP). Also, be careful that the thickness of the mounting flange is correct. When an intake manifold is bolted to a exhaust manifold, they should be machined so that the mounting surface is flat across them. __________________ Bill Cilker, Jr Unrestored 190A Victoria 45B, 160B & 189A Victoria Association President