Frozen jets: Heat the outside of the jet. This will usually break it loose.
Otherwise: Have a good set of drill bits. start with a small size and increment up. Be very careful you don't hit the threads. When you have most of it out use an easy out.
Some early 4100 carburetor used Holley Jets. This chart is for the more common Motorcraft jets.
MAKE
YEAR
MODEL
CARBURETOR NUMBER
TYPE
PRIMARY JET
SECONDARY JET
C7AF-AR
4100
C6AF-E
4100
C6OF-J
4100
C6OF-J
4100
C6SF-B
4100
C7AF-AL
4100
0.053
0.071
C7AF-AL
4100
C7AF-AM
4100
0.052
0.071
C7AF-AM
4100
C7AF-AN
4100
0.053
0.071
C6OF-H
4100
C7AF-AR
4100
0.052
0.071
C6OF-E
4100
EFA9-AA
4100
EFA9-AB
4100
EFA9-AC
4100
EFA9-BB
4100
EFA9-BC
4100
EFAO-AA
4100
EFAO-AB
4100
EFAO-AC
4100
EFAO-BA
4100
C7AF-AN
4100
C6MY-B
4100
C2AF-N
4100
C6AF-G
4100
C6AF-H
4100
C6AF-J
4100
C6AF-K
4100
C6MF-BE
4100
C6MF-C
4100
C6MF-C
4100
C6MF-F
4100
C6OF-H
4100
C6MY-B
4100
LSA1-SA
4100
C6MY-C
4100
C6MY-C
4100
C6MY-E
4100
C6MY-E
4100
C6MY-F
4100
C6MY-F
4100
C6OF-D
4100
C6OF-D
4100
C6OF-E
4100
C6MF-F
4100
C2AF-AK
4100
C1AE-AK
4100
C2AE-AN
4100
0.0612
C2AE-AN
4100
0.0612
C2AE-AR
4100
0.054
C2AE-AR
4100
0.054
C2AE-AT
4100
0.055
C2AE-AT
4100
0.055
C2AE-AV
4100
C2AF-AJ
4100
EFAO-BB
4100
C2AF-AK
4100
EDC-D
4100
C2AF-AL
4100
C2AF-AL
4100
C2AF-AM
4100
C2AF-AM
4100
C2AF-AN
4100
C2AF-AN
4100
C2AF-AR
4100
C2AF-AR
4100
C3AF-BY
4100
C2AF-AJ
4100
5751681
4100
C6AF-E
4100
LSA1-WA
4100
LSA1-XA
4100
LSA1-XB
4100
PB8M-J
4100
PB8M-K
4100
PB9M-D
4100
5751679
4100
5751680
4100
EDT-C
4100
5751681
4100
EDT-B
4100
5751682
4100
5751682
4100
5751683
4100
5751683
4100
5752308
4100
5752309
4100
5752425
4100
5752425
4100
EDC-C
4100
EFAO-BC
4100
5751680
4100
C4AF-AY
4100
C6AF-F
4100
B9MF-B
4100
C1AE-AL
4100
C1AE-AL
4100
C2AF-A
4100
C2AZ-G
4100
C2AZ-G
4100
C3AF-AD
4100
C4AF-AV
4100
B9MF-A
4100
C4AF-AY
4100
B9MF-A
4100
C4AF-AZ
4100
C4AF-AZ
4100
C4AF-BA
4100
C4AF-BA
4100
C4AF-BB
4100
C4AF-BB
4100
C4AF-BC
4100
C4AF-BC
4100
C4AF-BL
4100
C4AF-AV
4100
B8A-A
4100
C3AF-BY
4100
C3AF-BZ
4100
0.054
C3AF-BZ
4100
0.054
C3AF-N
4100
.056
C3AF-N
4100
.056
C3AF-R
4100
.056
C3AF-R
4100
.056
C3AF-S
4100
.056
C3AF-S
4100
.056
B9MF-B
4100
C3AF-T
4100
.056
C4AF-BM
4100
B8A-A
4100
B8A-E
4100
B8A-E
4100
B8A-V
4100
B8A-V
4100
B8A-W
4100
B8A-W
4100
B9A-E
4100
B9A-E
4100
C3AF-T
4100
.056
C5AZ-AY
4100
C4GF-Y
4100
C4GF-Y
4100
C4GY-A
4100
C4GY-A
4100
C4GY-B
4100
C5AF-AC
4100
0.049
0.06
C5AF-BA
4100
0.052
0.067
C5AF-H
4100
0.048
0.055
C5AF-H
4100
0.048
0.055
C4AF-BL
4100
C5AZ-AU
4100
C4GF-AA
4100
0.048
0.056
C5AZ-AY
4100
C6AF-AD
4100
C6AF-AD
4100
C6AF-AE
4100
C6AF-AE
4100
C6AF-AF
4100
C6AF-AF
4100
C6AF-AG
4100
C6AF-AG
4100
C5AZ-AU
4100
C4AF-CL
4100
C2AF-S
4100
C4AF-BN
4100
C4AF-BN
4100
C4AF-BS
4100
C4AF-BS
4100
C4AF-BT
4100
C4AF-BT
4100
C4AF-CG
4100
C4AF-CG
4100
C4GF-BA
4100
0.046
0.058
C4AF-CK
4100
C4GF-AZ
4100
0.048
0.056
C4AF-CM
4100
C4AF-DH
4100
C4AF-DU
4100
0.05
.067
C4AF-DU
4100
0.05
0.067
C4AF-DV
4100
0.048
0.057
C4AF-EH
4100
0.057
C4AF-F
4100
C4AF-F
4100
C4AF-K
4100
C4AF-BM
4100
C4AF-CJ
4100
C3AF-BV
4100
C8AF-BG
4100
C4GF-F
4100
C4GF-F
4100
C4GF-E
4100
0.049
0.055
C4GF-E
4100
0.049
0.055
C4GF-AB
4100
0.048
0.046
C3OF-AJ
4100
0.054
C2AF-N
4100
C3AF-BV
4100
C3AF-BU
4100
C2AF-U
4100
C2AF-S
4100
C3OF-AB
4100
0.054
C2AF-T
4100
C3AF-BU
4100
C2AF-U
4100
C2AF-Y
4100
C2AF-Y
4100
C2AF-Z
4100
C2AF-Z
4100
C2AF-T
4100
0.054
F0RD
1958
332”
5752309
4100
F0RD
1958
332”
5752308
4100
F0RD
1958
332”
5751679
4100
F0RD
1961-64
390” CANADA
C4AF-BJ
4100
F0RD
1961-64
390” CANADA
C4AF-BJ
4100
F0RD
1961-65
THUNDERBIRD 390” CANADA
C4SF-A
4100
F0RD
1961-66
THUNDERBIRD 390”
C6SF-A
4100
F0RD
1961-66
POLICE SPEC 390”
C4AF-DY
4100
0.048
0.058
F0RD
1961-66
POLICE SPEC 390”
C4AF-EF
4100
0.051
0.067
F0RD
1961-66
POLICE SPEC 390”
C5AF-AD
4100
0.052
0.067
F0RD
1961-66
POLICE SPEC 390”
C5AF-AE
4100
0.05
0.067
F0RD
1961-66
POLICE SPEC 390”
C5AF-AR
4100
0.052
0.067
F0RD
1961-66
POLICE SPEC 390”
C5AF-AT
4100
0.05
0.067
F0RD
1961-66
POLICE SPEC 390”
C5AF-K
4100
0.05
0.067
F0RD
1961-66
POLICE SPEC 390”
C4AF-DL
4100
0.05
.067
F0RD
1961-66
THUNDERBIRD 390”
C5SF-B
4100
0.048
0.061
F0RD
1961-66
POLICE SPEC 390”
C5AF-AS
4100
0.05
0.067
F0RD
1961-66
THUNDERBIRD 390”
C6SF-C
4100
0.048
0.067
F0RD
1961-66
THUNDERBIRD 390”
C2SF-A
4100
F0RD
1961-66
THUNDERBIRD 390”
C2SF-B
4100
F0RD
1961-66
POLICE SPEC 390”
C3AF-AT
4100
F0RD
1961-66
POLICE SPEC 390”
C3AF-AT
4100
F0RD
1961-66
POLICE SPEC 390”
C3AF-AU
4100
0.054
F0RD
1961-66
POLICE SPEC 390”
C3AF-AV
4100
F0RD
1961-66
POLICE SPEC 390”
C3AF-AY
4100
0.054
F0RD
1961-66
THUNDERBIRD 390”
C4SF-B
4100
0.048
0.057
F0RD
1961-66
THUNDERBIRD 390”
C5SF-A
4100
0.048
0.061
F0RD
1961-66
POLICE SPEC 390”
C4AF-DK
4100
F0RD
1961-66
THUNDERBIRD 390”
C2SE-C
4100
F0RD
1961-66
POLICE SPEC 390”
C5AF-J
4100
0.052
0.067
F0RD
1961-66
POLICE SPEC 390”
C4AF-DL
4100
0.05
.067
F0RD
1964
352”
C4AF-DG
4100
F0RD
1964-66
352”
C4AF-DF
4100
F0RD
1964-66
352”
C4AF-EA
4100
0.048
0.055
F0RD
1964-66
MUSTANG 289” CANADA
C4ZF-D
4100
F0RD
1964-66
352”
C5AF-AA
4100
0.048
0.055
F0RD
1964-66
352”
C5AF-AK
4100
0.05
0.06
F0RD
1964-66
352”
C5AF-AL
4100
0.048
0.055
F0RD
1964-66
352”
C5AF-AN
4100
F0RD
1964-66
352”
C5AF-AU
4100
0.05
0.06
F0RD
1964-66
352”
C4AF-DZ
4100
0.049
0.053
F0RD
1964-66
352”
C5AF-AV
4100
0.048
0.055
F0RD
1964-66
352”
C5AF-AZ
4100
0.049
0.06
F0RD
1964-66
352”
C4AF-N
4100
0.05
0.056
F0RD
1964-66
352”
C5AF-E
4100
0.05
0.06
F0RD
1964-66
352”
C5AF-F
4100
0.048
0.055
F0RD
1964-66
352”
C4AF-R
4100
0.058
F0RD
1964-66
352”
C5AF-Z
4100
0.05
0.06
F0RD
1964-66
352”
C6AF-AJ
4100
F0RD
1964-66
352”
C6AF-L
4100
F0RD
1965
352”
C4AF-DG
4100
F0RD
1965-67
MUSTANG 289”
C6ZF-D
4100
0.047
0.058
F0RD
1965-67
MUSTANG 289”
C5ZF-K
4100
F0RD
1965-67
MUSTANG 289”
C5OF-U
4100
0.05
0.069
F0RD
1965-67
MUSTANG 289”
C4OF-BU
4100
0.048
0.057
F0RD
1965-67
MUSTANG 289”
C4OF-AT
4100
0.051
0.07
F0RD
1965-67
MUSTANG 289”
C6ZF-E
4100
CJ156
0.058
F0RD
1965-67
MUSTANG 289”
C6ZF-F
4100
0.052
0.068
F0RD
1965-67
MUSTANG 289”
C7ZF-B
4100
0.051
CJ132
F0RD
1965-67
MUSTANG 289”
C7ZF-C
4100
0.05
CJ132
F0RD
1965-67
MUSTANG 289”
C4GF-BA
4100
0.046
0.058
F0RD
1965-67
MUSTANG 289”
C4GF-AF
4100
0.046
0.058
F0RD
1965-67
MUSTANG 289”
C5ZF-M
4100
F0RD
1965-67
MUSTANG 289”
C4OF-AL
4100
0.051
0.07
F0RD
1965-67
MUSTANG 289”
C4GF-AE
4100
0.048
0.056
F0RD
1965-67
MUSTANG 289”
C4ZF-C
4100
0.045
F0RD
1965-67
MUSTANG 289”
C4OF-BT
4100
0.051
0.07
F0RD
1966
428”
C6MF-E
4100
F0RD
1966
428”
C6MF-B
4100
F0RD
1966
428”
C6AF-F
4100
F0RD
1966
428”
C6AF-AC
4100
.047
.067
F0RD
1966
428”
C6AF-AB
4100
FORD
1957
312” 1ST FORD BUILT
ECZ-U
4100
FORD
1957
312” 1ST FORD BUILT
B7A-X
4100
FORD
1957
312” 1ST FORD BUILT
ECZ-Z
4100
FORD
1957
312” 1ST FORD BUILT
B7A-B
4100
FORD
1958-69
ALL
C2AE-AL
4100
0.055
FORD
1958-69
ALL
C2AE-AJ
4100
0.0612
FORD
1958-69
ALL
C2AE-AK
4100
0.054
FORD
1958-69
ALL
C2AE-AG
4100
0.055
FORD
1960
8 352 Ford & T-Bird
C0AE-J
4100
.063
FORD
1960
8 352 Ford & T-Bird
C0AE-K
4100
.053
FORD
1961-64
ALL
C1AE-AG
4100
FORD
1961-64
ALL
C1AE-AG
4100
FORD
1961-65
THUNDERBIRD 390
C2AE-AV
4100
0.054
FORD
1961-65
THUNDERBIRD 390
C2AE-AU
4100
0.0612
FORD
1961-65
THUNDERBIRD 390
C2AE-BA
4100
0.054
FORD
1961-65
THUNDERBIRD 390
C4AF-DJ
4100
FORD
1961-65
THUNDERBIRD 390
C2AE-AZ
4100
FORD
1961-65
THUNDERBIRD 390
C2SF-C
4100
FORD
1961-65
THUNDERBIRD 390
C3SF-B
4100
0.054
FORD
1961-65
THUNDERBIRD 390
C4SF-D
4100
FORD
1961-65
THUNDERBIRD 390
C4SF-E
4100
FORD
1961-65
THUNDERBIRD 390
C4SF-F
4100
FORD
1961-65
THUNDERBIRD 390
C4SF-G
4100
FORD
1961-65
THUNDERBIRD 390
C2AE-AY
4100
0.055
FORD
1961-66
THUNDERBIRD 390”
LSA1-TA
4100
FORD
1961-66
POLICE SPEC 390”
C6PF-H
4100
FORD
1961-66
THUNDERBIRD 390”
LSA1-TB
4100
FORD
1961-66
THUNDERBIRD 390”
C1AE-AH
4100
FORD
1963-66
FAIRLANE 289”
C5OF-L
4100
0.052
0.068
FORD
1963-66
FAIRLANE 289”
C5OF-M
4100
0.05
0.069
FORD
1963-66
FAIRLANE 289”
C5OF-T
4100
0.05
0.069
FORD
1963-66
FAIRLANE 289”
C5OF-U
4100
0.05
0.069
FORD
1963-66
FAIRLANE 289”
C5ZF-C
4100
FORD
1963-66
FAIRLANE 289”
C5ZF-D
4100
FORD
1963-66
FAIRLANE 289”
C5ZF-E
4100
FORD
1963-66
FAIRLANE 289”
C5ZF-F
4100
FORD
1963-66
FAIRLANE 289”
C5OF-K
4100
0.05
0.069
FORD
1963-66
FAIRLANE 289”
C5ZF-M
4100
FORD
1963-66
FAIRLANE 289”
C5ZF-J
4100
FORD
1963-66
FAIRLANE 289”
C6PF-H
4100
FORD
1963-66
FAIRLANE 289”
C6PF-M
4100
FORD
1963-66
FAIRLANE 289”
C6ZF-A
4100
0.049
0.058
FORD
1963-66
FAIRLANE 289”
C6ZF-B
4100
0.048
0.057
FORD
1963-66
FAIRLANE 289”
C6ZF-C
4100
0.052
0.068
FORD
1963-66
FAIRLANE 289”
C6ZF-F
4100
0.052
0.068
FORD
1963-66
FAIRLANE 289”
C3OF-AB
4100
0.054
FORD
1963-66
FAIRLANE 289”
C3OF-AJ
4100
0.054
FORD
1963-66
FAIRLANE 289”
C3SF-B
4100
0.054
FORD
1963-66
FAIRLANE 289”
C5ZF-K
4100
FORD
1963-66
FAIRLANE 289”
C4ZF-H
4100
FORD
1963-66
MUSTANG 289”
C4ZF-G
4100
0.051
FORD
1963-66
FAIRLANE 289”
C4ZF-G
4100
0.051
FORD
1963-66
FAIRLANE 289”
C5ZF-L
4100
FORD
1963-66
FAIRLANE 289”
C5OF-J
4100
0.052
0.068
FORD
1964-66
352”
C6PF-H
4100
FORD
1965-66
FALCON 289”
C6PF-H
4100
FORD
1965-66
MUSTANG 289”
C5ZF-C
4100
FORD
1965-66
FALCON 289”
C5ZF-D
4100
FORD
1965-66
FALCON 289”
C5ZF-D
4100
FORD
1965-66
FALCON 289”
C5ZF-E
4100
FORD
1965-66
FALCON 289”
C5ZF-F
4100
FORD
1965-66
FALCON 289”
C5ZF-J
4100
FORD
1965-66
FALCON 289”
C5ZF-K
4100
FORD
1965-66
FALCON 289”
C5ZF-M
4100
FORD
1965-66
FALCON 289”
C6ZF-A
4100
0.049
0.058
FORD
1965-66
FALCON 289”
C6ZF-B
4100
0.048
0.057
FORD
1965-66
FALCON 289”
C6ZF-C
4100
0.052
0.068
FORD
1965-66
FALCON 289”
C6ZF-D
4100
0.047
0.058
FORD
1965-66
FALCON 289”
C6ZF-E
4100
CJ156
0.058
FORD
1965-66
FALCON 289”
C5ZF-L
4100
FORD
1965-66
FALCON 289”
C5ZF-C
4100
FORD
1965-66
289
C4AF-DJ
4100
FORD
1965-67
MUSTANG 289”
C5OF-J
4100
0.052
0.068
FORD
1965-67
MUSTANG 289”
C4ZF-H
4100
0.051
FORD
1965-67
MUSTANG 289”
C6ZF-C
4100
0.052
0.068
FORD
1965-67
MUSTANG 289”
C6ZF-B
4100
0.048
0.057
FORD
1965-67
MUSTANG 289”
C6ZF-A
4100
0.049
0.058
FORD
1965-67
MUSTANG 289”
C6PF-H
4100
FORD
1965-67
MUSTANG 289”
C5ZF-J
4100
FORD
1965-67
MUSTANG 289”
C5ZF-F
4100
FORD
1965-67
MUSTANG 289”
C5ZF-E
4100
FORD
1965-67
MUSTANG 289”
C5ZF-D
4100
FORD
1965-67
MUSTANG 289”
C5OF-T
4100
0.05
0.069
FORD
1965-67
MUSTANG 289”
C5OF-M
4100
0.05
0.069
FORD
1965-67
MUSTANG 289”
C5OF-L
4100
0.052
0.068
FORD
1965-67
MUSTANG 289”
C5OF-K
4100
0.05
0.069
FORD
1965-67
MUSTANG 289”
C5ZF-L
4100
FORD
1966
THUNDERBIRD 428”
C6SF-A
4100
0.048
0.067
FORD
1966
390, 428
C6SF-B
4100
FORD
1966
THUNDERBIRD 390, 428
C8AF-AE
4100
0.051
0.071
FORD
1967-68
MUSTANG 289, 302
C8ZF-J
4100
FORD
1967-68
MUSTANG 289, 302
C8ZF-K
4100
