The Ford part number C4AP-7976-C corresponds to a bellhousing used in certain applications. Let’s break it down:

1. Application: This bellhousing was utilized for specific Ford vehicles.
2. Compatibility:
   • Case Fill: It fits the 272V8 engine with a case fill C4 transmission¹.
   • 
     
     
   • ¹.
   • 292V8: It also fits the 292V8 engine with a case fill C4 transmission

1. Ford vehicles.
2. Compatibility:
   • Case Fill: It fits the 272V8 engine with a case fill C4 transmission¹.
   • 64-65 289V8: For the 64-65 289V8, it’s a case fill bellhousing with a 2-bolt starter and 5 bolts attaching it to the motor. The part numbers associated with this application are C4AP-7976-A and C4AZ-7976-A¹.
   • 65-68 Case Fill: For the 65-68 models, it’s a case fill bellhousing with a 2-bolt starter and 6 bolts attaching it to the motor. The part numbers for this range are C5OP-7976-A and C5OZ-7976-A¹.
   • 292V8: It also fits the 292V8 engine with a case fill C4 transmission¹.

e is a AI search 

1. Application: This bellhousing was utilized for specific Ford vehicles.
2. Compatibility:
   • Case Fill: It fits the 272V8 engine with a case fill C4 transmission¹.
   • 64-65 289V8: For the 64-65 289V8, it’s a case fill bellhousing with a 2-bolt starter and 5 bolts attaching it to the motor. The part numbers associated with this application are C4AP-7976-A and C4AZ-7976-A¹.
   • 65-68 Case Fill: For the 65-68 models, it’s a case fill bellhousing with a 2-bolt starter and 6 bolts attaching it to the motor. The part numbers for this range are C5OP-7976-A and C5OZ-7976-A¹.
   • 292V8: It also fits the 292V8 engine with a case fill C4 transmission¹.

The Ford part number C4AP-7976-C corresponds to a bellhousing used in certain applications. Let’s break it down:

1. Application: This bellhousing was utilized for specific Ford vehicles.
2. Compatibility:
   • Case Fill: It fits the 272V8 engine with a case fill C4 transmission¹.
   • 64-65 289V8: For the 64-65 289V8, it’s a case fill bellhousing with a 2-bolt starter and 5 bolts attaching it to the motor. The part numbers associated with this application are C4AP-7976-A and C4AZ-7976-A¹.
   • 65-68 Case Fill: For the 65-68 models, it’s a case fill bellhousing with a 2-bolt starter and 6 bolts attaching it to the motor. The part numbers for this range are C5OP-7976-A and C5OZ-7976-A¹.
   • 292V8: It also fits the 292V8 engine with a case fill C4 transmission¹.

Here is the MPC ENGINE/AT combinations for the 1964 LT -


The C4 was not used on the 1964 FYB LT.

It would not have made sense to cast a one year bell for just a one year model run and the C4 most likely would not have taken the punishment the C/M could.

C = 1960's
4 = 1964
A = FORD CAR
P = POWER TRAIN
7976 - BASIC ENGINEERING PN For A BELL-HOUSING
C = Would Indicate Exact Application

C4 Would Indicate Release Year
A Would Indicate FORD Pass Car
The FYB Was Last Used On The 1962 PASS CAR - LT/MT 1964

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I'm inclined to agree. It might be worth going to ford-trucks.com to see what kind of response you get.

The C-4 was used with 272/292 Y blocks in South America  up until 1982 (best that I know)

Here is a blog that may help  

https://www.google.com.br/search?q=292+ford+transmission+in+Brazil&sca_esv=6494f03cb68baf5a&source=hp&ei=kGEIZq_JNvrLkPIPyp69oAo&iflsig=ANes7DEAAAAAZghvoB9CYEEP2xYEZwvB_cVaDX0znFEh&udm=&ved=0ahUKEwiv0fSV1pyFAxX6JUQIHUpPD6QQ4dUDCA0&uact=5&oq=292+ford+transmission+in+Brazil&gs_lp=Egdnd3Mtd2l6Ih8yOTIgZm9yZCB0cmFuc21pc3Npb24gaW4gQnJhemlsMggQABiABBiiBEjTzAFQygpYoKwBcAN4AJABAJgBiwGgAYwTqgEEMzMuMrgBA8gBAPgBAZgCJaAChRWoAgDCAgsQLhiABBjHARjRA8ICBRAAGIAEwgIFEC4YgATCAgcQABiABBgTwgIGEAAYFhgewgIIEAAYFhgeGA_CAgUQIRigAcICBBAhGBXCAgcQIRgKGKABwgIKECEYChigARjDBJgDAZIHBDM0LjOgB79-&sclient=gws-wiz#ip=1

Now is NA or SA production being discussed in this thread ...

SA is a completely different subject.

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That part number is a USA number, I've been looking for one of these for a long time, I missed one in Ohio ($25.00 if I remember right), I have never seen one in person (have seen a picture) I have a lot of rare stuff but not one of these. I know that's a car part number but the best I can find it was only in a truck.