...stock, 2v 289, auto trans, 65 Mustang? I have been looking for a 4100 to convert my 65 Mustang. I have an OEM 4v iron intake for it and want to stay close to stock original.

Seems there is a dizzying array of 1.08 part numbers out there, some for different years of small blocks, some for stick shifts, some for autos, some with heat shields,some with those 'dashpots'and maybe some with other features I am not aware of.

Is it possible to say which carbs I should be specifically looking for?

I also not want to inadvertantly stumble on to one of those California Emissions 1.08, like what I just read about further back in the posts.

Just look for any 1965 or 1966 Autolite 1.08 carb that is Z coded, That would be for a mustang small block and you will not get into the california emmissions carbs.

The california emmissions carbs a all 1966 carbs with and "A" code and are 1.08 as well.

5Z or 6 Z are what you will be looking for.

After that its the kickdown cable linckage or lack of that tells whther its a manual tranny or not, as far as the dashpots, every automatic transmission (ie one with a kickdown cable should also come stock with a dashpot which prevents the throttle from slamming shut and killing the engine on an automatic, (however most long quit working properly.)

Bill White
White Automotive

...2100 fit the 4100? Same for the kickdown linkage. Also are these dashpots, that are prone to inaction, be readily available at your local Napa? Is it really that important that they function right?

Also, how does the A code show up in the designation. I've seen a couple of 289 carbs offered by california sellers, one says A code with a C5ZF-D number and the other just stated 6A AC designation on the 'toe' of the carb.

The code I am talking about is on the toe of the carburetor, that is the accurate way to tell what the carbs ID is, Even if it has been changed (yes some unscrupalous people will change this number for you) you can tell .

On pre 65 number it is the 3rd number in So for example C5ZF-XX the Z indicated mustang, C4SF-XX the S indicates Thunderbird, C3AF-XX the A indicated Big car line.

On 66 and up Ford eliminated the redundant or obvious number to save money so the decade code and the engineering code got eliminated, so a 66 carb would read 6Z-XX for a 66 mustang, 6A-XX would be a 66 galaxie, 6S-XX would be a 66 thunderbird,
In later years it takes more sluething and knowledge of carburetors for example 8Z-XX would be a 68 mustang 3Z-XX would be a 73 mustang, but 6Z-XX could also be a 76 or as we have seen a 66 mustang but since ford quit building 4100's in 66 basically and the last 2100 was around 73, if this was a 2150 one coould easy deduce that it would be a 76 carburetor. With a little knowledge of what carbureto got installed on a given line with the part number it is easy to see where the carbs and correct numbers fit.

What you are see when someone mentions it as an "A'Code mustang is the A engine code on the vin number, ford during the 60's had many different engines of various tuning and different horsepower ratings, The A code designates a certain engine/horsepower rating depending upon the year. Of course then that also translates to differing heads, intakes, compression and carburetor requirements. The A code mustangs are usually the entry level performance V-8 engines, they usually had a four barrel with two barrel or non-highperformmance heads, and modest compression.
With ford in the 60's the lower the engine package usually the more popular the car, since most people during that time did not step up and order higher performance equipment, crazy isn't it.

Of course that is what makes a Z code or a G code or a S code or better yet an X code vehicle so desirable today For thsoe not in the know A Z code was generally a 320 HP 390 GT, G code a 405hp 406 tripower, S code 390hp 390 and a x code is the infamous 427 cammer engine.

Bill White

The info will certainly help me in my search.