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Holley carb ?
https://www.slantsix.org/forum/viewtopic.php?t=24451
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Author:  Charrlie_S [ Mon Aug 13, 2007 4:08 pm ]
Post subject:  Holley carb ?

Converting my 390 Vac sec 4bbl from a metering plate to a metering block. That way I can adjust the sec main jet size. Can anyone help with the equivilant jet size for a metering plate with the numbers 54?9716B so I have a baseline? The question mark in the number is an unreadable charater.

Author:  DusterIdiot [ Mon Aug 13, 2007 7:39 pm ]
Post subject:  The numbers...

How old is this carb?

The newer 90's ish carbs just have a number stamped on it like '34'.

The older part number system used to start with '34BP'-XXXX-(two digit plate number).

There is another set of plates that were just stamped '34BP-(4 digit part number).

-D.Idiot

Author:  Charrlie_S [ Thu Aug 16, 2007 5:06 am ]
Post subject: 

Thanks, DI. The first numbers were 34. When I removed the plate from the carb, I could see it better. Also found the jet size stamped on the plate. Hard to see as it was faint and on a casting line. # 59

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