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Daves55Sedan · 11-16-2019, 11:38 PM

[QUOTE=scicala;1821807I'm pretty sure the part number ID tags on these carbs was just on service carbs from the dealer. Could be mistaken. The stamping of Holley LIST numbers and date codes was very sporatic back then. I've seen some stamped right above the venture size on the top cover, and some stamped on top of the bowl cover, but most had nothing. I don't think they got consistent with the part number stampings until the teapot 4 barrels arrived in 1953 on the Lincoln. Once again, this is just for the Holley 94 type carbs.Sal[/QUOTE]

As far as the type of carb he has (2-bbl bug-sprayer carb), there were only two types and both were actually made by Holley.
The Ford EBU has no other identification than the ford oval on the passenger side of float bowl and "EBU" embossed on the opposite side of float bowl.
The Holley 2100 has embossed "Holley 2100" on passenger side of float bowl along with patent numbers below it.
The only real difference in the two are the accelerator pump actuator rod chamber in the main body. Otherwise, you really can't tell them apart, other than they have slightly different mixing chamber parts, and of course the EBU valve body has 1 inch venturis while the Holley 2100 has 1-1/16 inch venturi's.
If there is an aftermarket phenolic base with a PCV port available for the Holley 94 style carbs, i'm not aware of it, but some places are selling a composite base for the purpose of keeping the valve base further away from intake manifold heat, but I don't think they look thick enough to convert into a PVC connection.

11-16-2019, 11:38 PM	#25
Daves55Sedan Senior Member Join Date: May 2010 Location: Granite City, Illinois Posts: 3,008	Re: 1955 ford with 2 barrel ford carb [QUOTE=scicala;1821807I'm pretty sure the part number ID tags on these carbs was just on service carbs from the dealer. Could be mistaken. The stamping of Holley LIST numbers and date codes was very sporatic back then. I've seen some stamped right above the venture size on the top cover, and some stamped on top of the bowl cover, but most had nothing. I don't think they got consistent with the part number stampings until the teapot 4 barrels arrived in 1953 on the Lincoln. Once again, this is just for the Holley 94 type carbs.Sal[/QUOTE] As far as the type of carb he has (2-bbl bug-sprayer carb), there were only two types and both were actually made by Holley. The Ford EBU has no other identification than the ford oval on the passenger side of float bowl and "EBU" embossed on the opposite side of float bowl. The Holley 2100 has embossed "Holley 2100" on passenger side of float bowl along with patent numbers below it. The only real difference in the two are the accelerator pump actuator rod chamber in the main body. Otherwise, you really can't tell them apart, other than they have slightly different mixing chamber parts, and of course the EBU valve body has 1 inch venturis while the Holley 2100 has 1-1/16 inch venturi's. If there is an aftermarket phenolic base with a PCV port available for the Holley 94 style carbs, i'm not aware of it, but some places are selling a composite base for the purpose of keeping the valve base further away from intake manifold heat, but I don't think they look thick enough to convert into a PVC connection.