Intake Manifold

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August 26th, 2018, 06:02 AM

Loucobalt

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Join Date: Jun 2018

Posts: 43

Intake Manifold

Members, just picked up an intake manifold for my '69 350 at a local swap meet. After checking the casting # (390327) it looks like it was made for a '66 330 (4V).
wanted to know if it will fit my engine & that the runner design/flow would be the same as a period correct manifold (4V). Not worried about choke set up as I have a Qjet w/
electric choke going on it.
Thank !

August 26th, 2018, 06:23 AM

joe_padavano

Old(s) Fart

Join Date: Mar 2007

Location: Northern VA

Posts: 47,259

Quote:

Originally Posted by Loucobalt

Ports and fitment are the same. The only possible issue is that the 390327 intake only has one sensor port in the water crossover; the correct 398663 intake has two - the second was used for the thermal vacuum switch controlling vacuum advance in some applications.

August 26th, 2018, 07:06 AM

Loucobalt

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Thread Starter

Join Date: Jun 2018

Posts: 43

Joe, the intake that's on car now is an Eddy 3711 & the dizzy has been swapped for an
hei unit. Would those things have any bearing on needing the (2) sensors @ manifold ?
Just wanted to go back to a somewhat period correct cast intake.
Thanks !

August 26th, 2018, 07:20 AM

joe_padavano

Old(s) Fart

Join Date: Mar 2007

Location: Northern VA

Posts: 47,259

Quote:

Originally Posted by Loucobalt

The distributor has nothing to do with the need for the second port. Olds used a TVS on some cars to switch from ported to manifold vacuum if the engine started to overheat. If you are using straight manifold vacuum for the advance anyway, that's a moot point.

I question your desire to change the manifold, however. The HEI isn't "period correct" either. And frankly, if your goal is to just hide the late model E-brock intake, I'd simply grind off the logo, sandblast to eliminate the grinder marks, and paint the aluminum intake engine color.