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Three Carter carbs came with the 440-4 barrel automatic in 1970 on B and E body cars.
Carter 4738S Auto
Carter 4740S Auto + ECS
Carter 4741S Auto + A/C
Back to the OP request, for suggestions: (and opinions)
The carb being rebuilt can mean, it is cleaned, seals and gaskets replaced and adjustments approximated. It may not mean it is perfectly adjusted on the bench, nor ideally adjusted to your engine, throttle pressure setting, idle setting...
Some of these (above pictured) painted carbs do indeed look very nice. And some restorations don't get driven much. So who's to say what will last and what will not?
When faced with the costs of detailing aluminum and all the nooks and crannies we see on a Carter AVS (for example) and plating...
I see some painted carbs on epay, presumably to make them look better. I would not buy a painted carb for restoration. Painting is NOT the way to restore a Carter carb, in my opinion. If you want a concourse restoration, there are better ways to go. The pretty Carter carbs we see that are...
Port matching comes to mind. This is where one tries to match the intake ports from the manifold as perfectly as possible to the intake ports on the heads. This includes the gasket. You're shooting for a perfectly smooth transition between the intake and heads.
Can anyone tell me where and if the rubber boot (or grommet) on the throttle cable can be purchased? My cable had this boot, but it was in pieces and discarded. I went looking for the part, and I found an image from the engine bay side but no luck finding the boot.
Funny you should ask, I came across this ebay listing, today, and thought of this post! $16+shipping seems a bargain, if you need these.
66 73 Mopar Brass Float Set Edlebrock Carter AFB AVS 4 bbl carbs | eBay
I know a couple of places that have them. They may not be OEM, but they are functionally equivalent and will not show in your restoration. These are my two "go to" places for carburetor stuff:
THE CARBURETOR SHOP
Mike's Carburetor Parts
Agreed. The 4966S is listed as a 1971 carburetor for some 440-4 cars and models.
If you carefully inspect the carburetor list in the 1970-1971 parts book, section 14-30-0, you may observe NONE of the 1971 carburetors have a "with ECS" or "without ECS" designation.
And why is this? I propose...
Good call, @charge70 I tried to make that point in one of my discussions. The reason Hemming's Motor News does not cite the 4966 as an ECS carb, was in 1971, they were all, more or less, ECS carbs.
You're probably right, and I'm not saying your wrong, @pnora . But when I search epay using "Carter AVS 4966" the first 10 listings I see, all have the ECS internal float bowl vent. What are the odds all 10 of those carbs are wrong? I'm thinking really long odds.
If you need more or less pressure, I don't recommend modifying the spring.
On two different occasions, years apart, I was in a vehicle where the throttle return spring failed. In both of those cases, the owner had modified a single spring. In both cases, the failure point was the end hook...
The 1970-71 parts book categorizes the Carter 4740S as an ECS carburetor for the 440-4 HP with/without A/C. There are other models listed for the Non-ECS 440-4 HP engines.
The 1970 Plymouth factory service manual describes ECS as a (uppity) California-only thing, where the float bowl vent...