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Carb spacer

DynaBro

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Encountered a smashed up old black spacer under the Holley Double Pumper. Measures 3/8 which seems to be a rarer choice. Any reason the old owners chose 3/8 rather than a 1/2? I want to get one ordered today.
 
All the Holley stuff I see is 1”. I wonder if this wasn’t just installed due to convenience and not planning.
 
on my 70 Bee was DP no spacer.

P1020488.JPG
 
Is it an aftermarket intake. Good chance it was put on to make clearance for the linkage
 
There are probably at least a few benefits to a spacer, but mainly academic?

1) isolating the carb from heat.
2) it gives the intake charge a more gradual turn into the runner which helps flow.
3) it increases plenum volume.

I used one a long time ago mainly to address concerns regarding heat.
 
I must be getting old and losing it. That doesn't look like a stock intake manifold to me.
It said MOPAR so I assumed it was stock or close enough to it that I wouldn't have to differentiate the part.
 
How do you know it won't run BETTER without it?? But what if the car had square wheels and run, would you try and find replacement square wheels???....just curious...because.....??
BOB RENTON
Well I torqued everything correctly and it just blew loads of fuel out the base so yes, I think I should have take a clue from the previous builder.
 
Well I torqued everything correctly and it just blew loads of fuel out the base so yes, I think I should have take a clue from the previous builder.
did you have a gasket between the intake and carb?
 
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