Messages

I cannot speak any real authority about Shelby dates.

I can say, I have had a ton of gt500 carbs come in my shop that were original to the car and were pretty far off date wise.
Same goes with mismatched between BK/BJ sometimes being a month apart.

I don't have any reason to doubt the owners.

I tend to think on small batch stuff like Shelby's you are going to see more variables vs mass produced stuff for sure.

C6 when it sits can leak at dipstick o ring or servo lever plug inside the bellhousing.
The early style servo ball was the worst.

If I may ask:  What were the "List" numbers & "date codes" on the carburetors?

     Scott

I have seen 20 sets of these originals. All of the original 3360/3361 have a 634 date code. At least all the ones I've seen.

Shelby is later seen selling 1848s on the intake.
I can surmise there was one distinct casting, when they ran out they substituted fairly close generics. 

Gotcha!  Might have to.
Be cool to have in stock.
I don't really make much on logs/linkage but kinda need to have them.

https://www.afscarbs.com/2x4-parts-and-kit-1

I was thinking about contacting drew  for one of his in an unfinished  form "pile of parts"  to modify it for the small block 

There are no unfinished ones.

I made the 3x2 289 logs but have not made the 2x4 ones yet.
Maybe I will in the future, but I really don't know if it's worth making them. Plus I don't currently have an exact original to use for measurements etc

I had the 289 3x2 fuel logs remade if needed.

Seems to be the case more often than not..

Pat

Is a funny thing.
700-735-760 etc
They are all for the most part the same carb.
Same venturi size, same boosters, same throttle bore, same throttle shafts, etc

CJ carb only vary slightly one to another.
4129 is a little more odd, and in the 1970s there is some variation.
Different methods for the same end goal

Everything I have seen lists the C8ZX carburetor as 760 cfm 🤷�♂️
Pat

Yes but what you read is incorrect.

I got the kit from AFS with the paper bowl gaskets, I also got a new genuine Holley accelerator pump cover.  My GT 500 not concourse and I don't see a SAAC judge judging my to see if my accelerator pump cover is spec.  As an aside I  really like the content and knowledge of that guy over at AFS.  He hit a niche that no other guys I have seen hit. 60's Holleys.....

Yeah, he's ok... I guess...

As an aside, make sure you have the correct pump cover screws, as the new style takes different ones.

Oh and I am suprised no one has said .... this whole topic is a sales pitch for Edelbrock carbs 

A 56 year old Edelbrock would have it's own drama.

Check very closely for hairline crack at the pump cover where the arm and pin is.
I have seen a tiny crack there and it opens up a tiny bit with throttle.

I've also seen trash in the pump cover screw holes that give a false torque.

I use fiber fuel bowl screws, I just rub vaseline into the paper and they seem pretty good to go. I'm not a fan of nylon gaskets.

Anything you need from me just ask, I'm around

Depending on idle speed and tslot exposure, is a common thing that a cj style carb can idle with a mixture screw closed.

Is pretty rare that putting an engine in gear stalls due to a rich condition, typically the opposite is true. An engine leans out significantly when a load is placed on it.

If it was one of mine, contact me. If not, why not discuss with the builder?

I would look for outside variables tho. You mention "it used to run great."

This makes me pause and wonder what may have changed, carbs are really feedback devices of sorts, they only really react to given inputs.
Something as simple as initial timing changing could cause an otherwise perfect running carb to become a basket case.

Drew

I don't try to buy bk/bj carbs or 3259s
Better an end user buy them

Oh yeah man, didn't take it in a negative way.
I just feel bad that sometimes folks ask for stuff and it takes me a year to get to it.
I guess just explaining that.

Appreciate the comments!

Isn't that I was not wanting to do them,
It is just that my stock always takes a back burner to mail ins.
When a customer pulls their carbs off a car and sends them to me, getting them back is the priority. I hate going offshore and leaving a customer's parts in the shop.
My stock always waits until I have the time.

The other issue is all of my stock was found over a decade+, there are rarely "sets."  Whenever I'd see a single SK carb I'd buy it.
I have a few dozen singles and I try my best to match them up and get them so they'll work together.

Either way, these will work for Michael's car and at least they are off the shelf.