sold..

 

That's a good one and I'm glad I don't need it. Same date as my car. GLWS.

 

Who did the restoration.....it looks great!

 

Just curious, What is the casting number on the base plate? It is located on the back right corner looking down at the bolt hole location. (right side looking at it from the front) Would be left side of car... It is in a circle

 

Looks like 705234....??

 

7038294..same as used on the 256 I believe.. but I'm no expert.

7040255 on left, 7040256 on right

 

Thanks, I thought that was the case also but was not sure. I am not an expert on the 255

 

the hanger for secondary air valve metering rods shows an "N" hanger, which really is very lean above 3,800 rpm. Most real 255 carbs came with "E" hangers. Hmmmmm

 

Is this the same carb that was listed on eBay couple weeks back?

eBay item number:
132278775741

 

I looked at my old 7040255 W31 carb with a 0970 build date and it also has "N" hangers. The second one I had with similar early 70 build date (0900) had an "H" hangers. The 0900 carb was all original and taken off an auto W31. Hmmmmm

 

Thanks Dave, I didn't notice that. I do have a proper hanger, and it has the AU rods. Although Ive seen a few with AX rods as well. Get that fixed asap.

Both 256's I have use the "G" hanger. I have an nos 256 as well, but don't want to remove the shrink/plastic top just to check the hanger. It's a service date with the later airhorn, so I'm guessing it's different.

 

Both of the 0256 I had with 69 date codes had the "I" hanger and AU rods.

 

I changed the hanger to an E , and the rods are AU.

I heard that the hangers may have been changed anytime the carbs were flow tested or "trended" for the best performance. Any hanger which improved performance was used for that particular trend.

Eric, yes I had two other originals with an I, ad a J.

 

You should have 57 primary jets with no metering rods. Hey can you post a pic of the front of the carb base below the fuel filter inlet? Thx, Al

 

here ya go Al...

 

No APT. The real deal! Nice. So happy to see that. I will pass that onto a friend. Thanks Mike.

 

OK, I checked my Rochester Engineering Secondary Air Valve Hanger Specifications Chart for Q-jets. I had made a hand written note next to the "E" hanger specs. which was "W31 #1", then next to "G, H, I hanger W31 #2". I agree on Rochester's Test Flow of all Q-jets and that they did make changes for both air/fuel flow and Emissions. Don't forget about the more strict Fed. Emissions for the 1970 Model Year Production that took effect on Jan 1st, 1970.

I just don't agree about the "N" hanger on a W31 carb. Maybe on a reg. 350 or 455. Also, on those 1970 W cars sold in Calif. that had to have the "N9" Emission Option may have had the "N" hanger. I never really got in to all the parts that made up the "N9" Option or the specs. I do know about certain aspects of the system, but not all, so I am pretty lame on that.

 

is your carburetor still available? Thanks Gene. 259-228-1442

 

Way to go Mike. Bet the buyer is one happy camper. Very nice 255 carb. Al

 

wrong number. Sorry 250-228-1442