While the B5A-9510-R carburetor is not the original oem equipped carb for a 1955 Thunderbird, it did became a legitimate replacement to be used on the ’55 Thunderbirds when looking at the 1949-1959 Ford Car Parts catalog.  While it’s not concurs correct, there’s still some documentation showing it to be a viable replacement on the 1955 Thunderbirds.  There were several ’55 Thunderbird 4V carbs that became consolidated or replaced as the B5A-9510-R carburetor in that 1959 catalog.  Regardless of all that, Frank’s carburetor is a new carb and as such, would be a great replacement for any ’55 Ford needing a year correct model 4000 Holley. 
 
Depending upon how long any of those model 4000 Holley carbs has set on a shelf and what the storage conditions were, the rubber O rings for the fuel transfer tubes could be hard and brittle and potentially need replacing.
  

Lorena, Texas (South of Waco)

If you go to the MPC TEXT PG 324 (SECT 95), you will come across the CARB APPL LISTING.

On application-

55 A (PASS CAR) (182HP SPL w F/M) 272
55 S (BIRD) w F/M 292
STAMPING ID NO - ECJ 9510-M - ECK 9510-T
Both ID NOS go to SVC PN B5A 9510-R and that carb shows no replacing/superseding PN.

ECJ 9510-M and ECK-T both showing going directly to SVC PN B5A 9510-R (PG 321 ID Crossover Chart)

What you have is a much later SVC REPL Carb. Was there an original parts box?

This is drawn from the 49/59 MPC FINAL ISSUE 1964. If you can find an earlier catalog or O.S.I. Manual, you may discover more info.

TED's HOLLEY CATALOG will most likely give more info.

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OK please let me know what the experts think it fits, passenger, t-bird or both or truck as one guru suggested, so far all agreed it's 1955, a start? 

Assembly tag.



- ECK-9510-K - 1074-1N-

The book I used is the Ford parts manual for 1949-1959, blue cover. Two books, one with pictures and the other with text. This is just too much work to sell NOS parts.

That explains it. Being ID'd as MOTORCRAFT, it dates the carb back to 1972/73 year release

EDIT.- 1972/1973 being the earliest part release date as MOTOR-CRAFT designated was begun in that time period changing from AUTO-LITE. -

I also now understand the term BLUE BOOK as you are referring to the 1949/1959 MASTER PARTS CATALOG.

THANX for your patience as I am on a very steep learning curve.

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Assembly tag. The book I used is the Ford parts manual for 1949-1959, blue cover. Two books, one with pictures and the other with text. This is just too much work to sell NOS parts.

I'm not an expert on all of the errors that Ford made in there parts manuals, is anyone?

You don't understand. FORD made no errors, as  what is being described from cataloging  is SERVICE PARTS updates. The FORD P&A SYSTEM is designed to show FORD SERVICE PARTS and SERVICE PARTS REPLACEMENT. It in no way accurately describes FORD ASSEMBLY PARTS and was never intended to. 

The HOLLY MANUAL describes only what was ordered, designed for and released to FOMOCO. What FOMOCO did with said parts can vary drastically in an assembly plant(s).

If you could take a photo(s) of the Stamping Nos.and/or ASSY TAG, it may help as for the concise original application

However you came across the PN B5A 9510-R is the question. While an original SERVICE PN, it also replaced several earlier carb SERVICE PN's. ECK 9510-T (Engineering ASSY PN) may not have crossed to the B5A-R SERVICE PN in original cataloging. It merely became a later service replacement PN.

As for guru's, they would have to had a car that was an untouched original assy to determine what was and was not.

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Tag = B5A 9510 R, back to the blue book?

Is this ID NO stamped on the carb base or is there actually an attached Assy ID Tag?

What is this BLUE BOOK you keep referring to?

I don't think anyone is accusing you of anything. You asked for a application and the info that was offered is pertinent to this time period (well actually, 1964). To be absolutely certain, one would need the first quarterly FORD CHASSIS CATALOG (1955) and any pertinent PRODUCT LETTERS to confirm original issue.

Take the CTGI MANUAL for instance. Where they source their info from makes a huge difference in component correctness. If they draw their info from post-1955 publications, there is no way for them to confirm what was original (assembly) or later service upgrades/replacements.

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Tag = B5A 9510 R, back to the blue book? Lots of experts and conflicting information out there. Having owned, driven and overhauled this stuff for many years and have run into conflicting information before, go figure. I've been driving my 56 bird for 55 years. A NOS teapot should work just fine, maybe better than a restored painted one. I'm not an expert on all of the errors that Ford made in there parts manuals, is anyone? What I'm offering is a carb that should be street legal that's why I listed it as both A & S code. Did not try to scam anyone, just want to get some of my collection of NOS parts back out there, I think it's called down sizing.  Frank

A very smart gentleman who has restored early Thunderbirds  for years and years and who has authored a very detailed manual on early birds





54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

Original 55 and 56 TBird carbs had a prefix of ECJ, including the Ford replacements per the TBird guru's.  This coincides with Ted's info.

Just wondering. What is your source of information?

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