Topic: Correct Carb?

[lprice1024]

Just inherited a 1967 GTA Convertible with the 390 CI engine. Is the correct carburetor a Holley 4 Barrel #C70F9510D?
Is it possible to get a rebuilt one or is it possible to rebuild this one?
Should the last letter in the Model # be a D or either A,B, or C?

Additional Info -  DSO - 15, TRANS - U, DATE - 27F, AXLE - 1, TRIM - 2A
Thanks,
LP

[67gtasanjose]

C70F-9510-D comes back as 390 Auto Trans, Mustang, Cougar, Comet, Fairlane w/ California Emissions
http://www.mustangtek.com/4150/C7OF-9510-D.html
Looks like non-California Emissions should be a suffix of "B"

"A" & "C" are for 4-speed applications

[rodster]

Just inherited a 1967 GTA Convertible with the 390 CI engine. Is the correct carburetor a Holley 4 Barrel #C70F9510D?
Is it possible to get a rebuilt one or is it possible to rebuild this one?
Should the last letter in the Model # be a D or either A,B, or C?

Additional Info -  DSO - 15, TRANS - U, DATE - 27F, AXLE - 1, TRIM - 2A
Thanks,
LP

Welcome! 

That's a nice inheritance.  Someone must think a lot of you.

Would love to see some pictures of it.

[lprice1024]

I'll work on getting pictures of it.

What makes it "California Emissions"?

Thanks for your patience, I'm a newbie at this stuff.

[jwc66k]

What makes it "California Emissions"?

It's the selection of internal items, jets, atomizers, booster venturies, plus external settings. The emphasis was on low NoX, and hydrocarbons. Mileage was secondary. If you buy an original 4100 from an auto parts store, you will get a "generic" one size fits all using what ever internals are available. When Pony Carbs was in business, you got pretty much everything correct.
Jim

[J_Speegle]

C70F-9510-D comes back as 390 Auto Trans, Mustang, Cougar, Comet, Fairlane w/ California Emissions

+1 from my other reference manuals

I'll work on getting pictures of it.

Should look pretty similar to this one without the dashpot.

What makes it "California Emissions"?

Your car likely haas a DSO or 71 or 72 indicating that it was ordered (and likely delivered) from a dealer in California which required the thermactor system to be installed that year on cars sold in that state

Your system is likely missing since many owners removed them over the years.

[67gtasanjose]

Just inherited a 1967 GTA Convertible with the 390 CI engine. Is the correct carburetor a Holley 4 Barrel #C70F9510D?
Is it possible to get a rebuilt one or is it possible to rebuild this one?
Should the last letter in the Model # be a D or either A,B, or C?

Additional Info -  DSO - 15, TRANS - U, DATE - 27F, AXLE - 1, TRIM - 2A
Thanks,
LP

If your car is indeed a DSO 15, Jeffs comment on DSO 71 or 72 isn't right. More likely the carb was switched out or exchanged along the way with the wrong one. Rebuilders did that a lot.

[Paperback Writer]

67gtasanjose is correct - a 390 Automatic for DSO 15 would have most likely used the C70F-9510-B carb...

Here are a few shots of one for reference:

[lprice1024]

So, visually there's really no difference between the B & the D model? It's the internal "stuff" that's different?
I'm pretty positive that the car is a DSO 15.
Anyone know where to get a B Model? Or where to swap my D Model for a B model?
Thanks,
Larry

[67gtasanjose]

Though not as likely as just the carb being swapped out somewhere in time, but the engine itself actually could have been swapped out complete with carb too. DSO 15 would not have been a Calif Equipped emissions, true. If you are truly concerned about matching up the numbers, maybe you can also confirm the numbers on the block and heads, as well as intake manfolds before hunting down another carb. No point swapping just the carb if the engine itself is also a Cally model...just saying. 

[lprice1024]

Thanks for all the great info. I'm pretty confident it's the correct engine and  that all numbers match.

[J_Speegle]

Anyone know where to get a B Model? Or where to swap my D Model for a B model?

Your going to be placing ads on a bunch of the forum sites and hope for the best. While your at it ask for a specific time period for the date but mention in the wanted ad that "other will be considered"

Good luck  Believe I've only got Thermactor manual carbs

[67gtasanjose]

Anyone know where to get a B Model? Or where to swap my D Model for a B model?

I've emailed a friend who worked for Pony Carbs and has done restoration work on these.
I'll see if he can help locate one fro you too

[TLea]

So, visually there's really no difference between the B & the D model? It's the internal "stuff" that's different?
I'm pretty positive that the car is a DSO 15.
Anyone know where to get a B Model? Or where to swap my D Model for a B model?
Thanks,
Larry

Before you go through the hunt of finding a B do a little homework. Not saying the carb is original but it seems unlikely it would have got swapped for same year/engine carb from different DSO. Confirm your DSO, do you have actual build date of car (Marti report)? What is the date on the carb? It is a 3 number or number/letter code under the carb part # on the airhorn. Look for other Thermactor clues such as missing/unused/wrong bracketry on passenger front of engine. Also see if heads have smog tube ports plugged right near your exhaust ports

[67gtasanjose]

Before you go through the hunt of finding a B do a little homework. Not saying the carb is original but it seems unlikely it would have got swapped for same year/engine carb from different DSO. Confirm your DSO, do you have actual build date of car (Marti report)? What is the date on the carb? It is a 3 number or number/letter code under the carb part # on the airhorn. Look for other Thermactor clues such as missing/unused/wrong bracketry on passenger front of engine. Also see if heads have smog tube ports plugged right near your exhaust ports

+1 on these thoughts & questions. Something seems "fishey" from the start of this thread, but cannot seem to figure it out with the info presented.
That is why I was asking to check the actual engine (build) numbers too. Trying to establish fact from fiction. My thoughts are to at least get this carb he has refurbished to enjoy the ride untill all of the rest is sorted out and correct parts & pieces are assembled for the "concours correctness".