Oh, I think the vacuum port in the phenolic spacer under the carb goes to
the PCV valve on the right valve cover...
On 7/18/10 2:47 PM, "Steve Laifman" <slaifman@socal.rr.com> wrote:
> Thanks for your post, Mc Dangerous (M), and Allan,
>
> I remembered that I, too, had some fiddling to do with the F4B/Holley
> installation. There was no tube on the carburettor to a attach to the
> distributer vacuum advance port. The available gaskets, with such a port,
> would stick the air filter through the LAT hood.
>
> This wouldn't influence those that replaced the distributor with one that
> does not have vacuum advance. I wanted it "stock" but put the "Ignitor" kit
> in and had the advance curve tuned to the car with spring replacement.
>
> So, I took the easiest approach possible. I replaced the carburettor butterfly
> lower unit with a new replacement part that did have a vacuum port.
>
> No hood banging, and easy adaption. The thinnest composite gaskets with a
> vacuum port I could find were still too thick.
>
> While then, a carb parts source would still have new pieces. Now, they
> probably have used pieces. Watch the shaft wear on used units.
>
> Steve
>
> Steve Laifman
>
> Editor
>
> http://TigersUnited.com
>
>
> Would U. Believe wrote:
>>
>> Allan,
>>
>> Bottom line up front: I would suggest you find and buy a Mustang Boss 302
>> phenolic carburetor spacer (or any other thin phenolic spacer) with a vacuum
>> port and try that. Here's why...
>>
>> When I adopted my Tiger, it had a very heavy cast iron Ford four barrel
>> intake manifold and a Holley 600CFM carburetor on it. Sandwiched between
>> these parts was a one inch thick aluminum spacer with a vacuum port. One of
>> the first things I did was to change over to an F4B and a 465 CFM
>> carburetor. Immediately, I noticed was that with the F4B being much taller
>> than the Ford intake, the carburetor would not fit under the hood with the
>> one-inch spacer. So I eliminated the carb spacer. You guessed it...the
>> result was that I had the very same symptoms as the ones you describe.
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