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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