Ignition System Parts

M-Block 351M/400 Parts Reference

Ignition System Parts

Copyright © 2002-2003 Dave Resch
All rights reserved.

Letter of permission on hand, thank you Dave Resch  ~BlizzND


This section lists Ford part numbers, calibration ID codes, and Motorcraft part numbers (if available) for the following M-block (351M/400) ignition system parts:

  • Distributors
  • Vacuum advance modules
  • DuraSpark II ignition control modules
  • Miscellaneous ignition parts

 

Check out this section if you are not familiar with Ford part numbers and ID codes.

Distributors

All M-block (351M/400) distributors are mechanically interchangeable with all 351C engines and all 385-series (429/460) engines. However, much like carburetors, distributors are calibrated for a specific vehicle and engine application.

Distributor calibration includes:

  • Vacuum advance specification — total advance and threshold vacuum
  • Mechanical (centrifugal) advance specification — total advance and “curve” (i.e., the rate at which advance comes in and the engine speed at total advance)

 

The following tables list calibration ID codes and Ford service part numbers for M-block (351M/400) truck engine distributors.

These tables are organized by model year and truck model, with a complete table for each model year from 1977 to 1982.

Some of these distributors are still available as brand new, complete assemblies from Ford. Prices range from under $100 to over $500 each. Unless obsolete, you can use the Ford service part number to order one of these distributors from a Ford dealer parts department.

1977 Ford Truck Distributors
Model Application Calib ID Part Number
F100 351M/400, auto trans D7AZ-12127-A
F100 351M, manual trans D7TZ-12127-B
F150/250/350 351M/400 D7TE-AHA D7TZ-12127-AC
F150/250/350 351M, manual trans,
CA emissions
D7TE-ALA D7TZ-12127-AL
F150/250/350 351M D7TE-AMA D7TZ-12127-AM
F150/250/350 351M D7TE-NA D7TZ-12127-N
F150/250/350 400 D7TE-PA D7TZ-12127-P
F150/250/350 400 D7TE-RA D7TZ-12127-R

 

1978 Ford Truck Distributors
Model Application Calib ID Part Number
Bronco, F150/250/350 351M, auto trans D7TZ-12127-AM
Bronco, F100/150/250 351M, auto trans,
CA emissions
D7AZ-12127-A
Bronco, F150/250/350 351M, manual trans D7TZ-12127-AL
Bronco, F100/150/250 351M, manual trans,
CA emissions
D8TZ-12127-P
Bronco, F150/250/350 400, auto trans D7TZ-12127-P
Bronco, F150/250 400, auto trans,
CA emissions
D8TZ-12127-F
Bronco, F150/250/350 400, manual trans D7TZ-12127-AM
F100 351M, auto trans,
high-alt
D8TZ-12127-R
F100 400 D7AZ-12127-A
F350 351M/400,
CA emissions
D7TZ-12127-AC

 

1979 Ford Truck Distributors
Model Application Calib ID Part Number
Bronco 351M, auto trans D7TE-AMA D7TZ-12127-AM
Bronco, F150/250LD 351M/400, auto trans D9TE-AKA
D9TE-DA
D9TZ-12127-H
Bronco 351M, manual trans D7TE-ALA D7TZ-12127-AL
Bronco, F150/250LD 351M/400, manual trans D9TE-AMA D9TZ-12127-G
Bronco 400, manual trans D7TE-AMA D7TZ-12127-AM
F100 351M, CA emissions D9TZ-12127-AJ
F100 351M, high-alt D9TZ-12127-B
F100 351M, auto trans D7AZ-12127-A
F100 351M, auto trans D9TE-DA D9TZ-12127-H
F100 351M, manual trans D9TZ-12127-A
F150/250LD 400, auto trans D7TE-PA D7TZ-12127-P
F150/250LD 400, auto trans,
CA emissions
D9TZ-12127-E
F250HD/350 351M D7TE-AHA D7TZ-12127-AC
F250HD/350 351M D7TE-AMA D7TZ-12127-AM
F250HD/350 351M D8TE-AHA D9TZ-12127-D
F250HD/350 400 D7TE-ALA D7TZ-12127-AL
F250HD/350 400 D9TE-DA D9TZ-12127-H

 

1980 Ford Truck Distributors
Model Application Calib ID Part Number
Bronco, F150/250LD 351M, auto trans EOUZ-12127-C
Bronco, F150/250LD 351M, manual trans EOTE-HA EOTZ-12127-H
Bronco, F150/250LD 351M, manual trans EOTE-LA EOTZ-12127-L
Bronco, F150/250LD 351M, manual trans,
CA emissions
EOTE-SA EOTZ-12127-S
F250LD 400 EOUZ-12127-C
F250HD/350 351M D7TZ-12127-AC
F250HD/350 400, auto trans D7TZ-12127-AL
F250HD/350 400, manual trans D7TZ-12127-AM
F250HD/350 400, CA emissions D9TZ-12127-AT

 

1981 Ford Truck Distributors
Model Application Calib ID Part Number
Bronco, F150/250LD 351M, auto trans EOUZ-12127-C
Bronco, F150/250LD 351M, manual trans E1TZ-12127-E
F250HD/350 351M D7TZ-12127-AC
F250HD/350 400, auto trans D7TZ-12127-AL
F250HD/350 400, manual trans D7TZ-12127-AM
F250HD/350 400, CA emissions D9TZ-12127-AT

 

1982 Ford Truck Distributors
Model Application Calib ID Part Number
F250HD/350 351M E2TZ-12127-K
F250HD/350 400, auto trans D7TZ-12127-AL
F250HD/350 400, manual trans D7TZ-12127-AM
F250HD/350 400, CA emissions D9TZ-12127-AT

Vacuum advance modules

The following tables list calibration ID codes and Ford service part numbers for M-block (351M/400) truck engine distributor vacuum advance modules.

These tables are organized by model year and truck model, with a complete table for each model year from 1977 to 1982.

Unless obsolete, you can use the Ford service part number to order these vacuum advance modules from a Ford dealer parts department.

1977 Ford Truck Vacuum Advance Modules
Model Application Calib ID Part Number
F100 351M/400 D5AZ-12370-A
F150/250/350 351M/400 D7TE-AHA D5TZ-12370-E
(Motorcraft DD-714)
F150/250/350 351M/400 D7TE-ALA
D7TE-AMA
D7TE-RA
D7TZ-12370-C
F150/250/350 351M/400 D7TE-NA
D7TE-PA
D5AZ-12370-A

 

1978 Ford Truck Vacuum Advance Modules
Model Application Calib ID Part Number
Bronco, F150/250 351M/400,
CA emissions
D5AZ-12370-A
Bronco, F150/250 351M/400, 49-state D7TZ-12370-C
F100 351M, auto trans,
high-alt
D5AZ-12370-B
F100 351M/400, auto/manual trans D5AZ-12370-A
F350 351M/400,
CA emissions
D5TZ-12370-E
F350 351M/400, manual trans D7TZ-12370-C
F350 400, auto trans D5AZ-12370-A

 

1979 Ford Truck Vacuum Advance Modules
Model Application Calib ID Part Number
Bronco, F250HD/350 351M/400 D7TE-ALA
D7TE-AMA
D7TZ-12370-C
Bronco, F150/250LD 351M/400, auto/manual trans D9TE-AKA
D9TE-AMA
D5AZ-12370-A
F100 351M, CA emissions D5TZ-12370-D
F100 351M, 49-state D5AZ-12370-A
F250HD/350 351M D7TE-AHA
D8TE-A
D5TZ-12370-E
F250HD/350 400 D9TE-DA D5AZ-12370-A

 

1980 Ford Truck Vacuum Advance Modules
Model Application Calib ID Part Number
Bronco, F150/250LD 351M, auto/manual trans EOTE-HA
EOTE-LA
D5AZ-12370-A
Bronco 351M, manual trans,
CA emissions
D7TZ-12370-F
F150/250LD 351M, manual trans EOTE-SA D7TZ-12370-F
F250LD 400, auto/manual trans D5AZ-12370-A
F250HD/350 351M D5TZ-12370-E
F250HD/350 400, 49-state D7TZ-12370-C
F250HD/350 400, CA emissions D5TZ-12370-D

 

1981 Ford Truck Vacuum Advance Modules
Model Application Calib ID Part Number
Bronco, F150/250LD 351M D5AZ-12370-A
F250HD/350 351M D5TZ-12370-E
F250HD/350 400, 49-state D7TZ-12370-C
F250HD/350 400, CA emissions D5TZ-12370-D

 

1982 Ford Truck Vacuum Advance Modules
Model Application Calib ID Part Number
F250HD/350 351M D4OZ-12370-D
F250HD/350 400, 49-state D7TZ-12370-C
F250HD/350 400, CA emissions D5TZ-12370-D

DuraSpark ignition control modules

The following table lists Ford service part numbers and Motorcraft part numbers for all 1977 to 1982 M-block truck DuraSpark II ignition control modules.

’77-’82 M-Block Truck DuraSpark II Ignition Modules
Application Ford Svc P/N Motorcraft P/N
’77-’82 351M/400 truck
Blue grommet
D9VZ-12A199-A DY-184C
’77-82 351M/400 truck
Blue grommet
F2PZ-12A199-AA
Update replacement.
DY-683
Update for DY-184C.
’77-’80 351M/400 truck
High-altitude emissions
Yellow grommet
D9AZ-12A199-C DY-237A
’81 351M LD truck
High-altitude emissions
Yellow grommet
E1AZ-12A199-A DY-297
’81-’82 351M/400 HD truck
CA emissions
D9AZ-12A199-B DY-249A
The following table lists original Ford engineering part numbers, current Ford service part numbers, and Motorcraft part numbers for all 1974 to 1975 DuraSpark ignition control modules (DuraSpark I) and all 1976 to 1991 DuraSpark II ignition control modules.
’74-’91 DuraSpark Ignition Control Modules
OEM Ford P/N Ford Svc P/N Motorcraft P/N
D4AE-12A199-A1A
Black grommet
D4AZ-12A199-A DY-157
D4AE-12A199-A2C
Black grommet
D4AZ-12A199-B DY-157A
D4AE-12A199-A1D
D4AE-12A199-A2D
Black grommet
D4AZ-12A199-C DY-157B
D5AE-12A199-A1A
D5AE-12A199-A2A
Green grommet
D5AZ-12A199-A DY-166
D5AE-12A199-A1B
D5AE-12A199-A2B
Green grommet
D5AZ-12A199-B DY-166A
D5AE-12A199-A1D
D5AE-12A199-A2C
D5AE-12A199-A2D
Green grommet
D5AZ-12A199-C DY-166B
D6AE-12A199-A1A
D6AE-12A199-A2A
Blue grommet
D6AZ-12A199-A DY-184
D6AE-12A199-A1B
D6AE-12A199-A2B
Blue grommet
D6AZ-12A199-B DY-184A
D8VE-12A199-A1B
D8VE-12A199-A2B
Blue grommet
D7AZ-12A199-B DY-184B
D8VE-12A199-A1C
D8VE-12A199-A2C
Blue grommet
D9VZ-12A199-A DY-184C

Blue grommet
F2PZ-12A199-AA DY-683
Update for all DY-184 modules.
D8AE-12A244-AA
Yellow grommet
(3-wire 3rd plug)
D8AZ-12A199-A DY-237
D8AE-12A244-AB
Yellow grommet
(3-wire 3rd plug)
D9AZ-12A199-C DY-237A
D8VE-12A199-A1B
D8VE-12A199-A2B
Red grommet
D7AZ-12A199-A DY-204
D9DE-12A199-B1A
D9DE-12A199-B2A
Brown grommet
D9AZ-12A199-B DY-249A
D9EE-12A244-A1A
D9EE-12A244-A2A
White grommet
D9FZ-12A199-A DY-250
E1AE-12A244-A
E1AE-12A244-AA
E1AF-12A244-AA
E2FF-12A244-AA
Yellow grommet
(2-wire 3rd plug)
E1AZ-12A199-A DY-297

Miscellaneous ignition parts

The following table lists Ford service part numbers and Motorcraft part numbers for various ’77-’82 M-block truck engine ignition parts.

Description Ford Svc P/N Motorcraft P/N
Ballast resistor, 49″ wire D7AZ-12250-A DY-213
Ballast resistor, 57″ wire C9OZ-12250-A DY-85
Ballast resistor, 60″ wire D1AZ-12250-A DY-84A
Ballast resistor, 61″ wire C0LF-12250-A DY-37
Distributor armature D3AZ-12A099-A DT-1
Distributor cap D6TZ-12106-A DH-411B
Distributor cap adapter base DJ-6
Distributor rotor E6TZ-12200-C DR-380A
Distributor stator (magnetic pickup) D4PZ-12A112-A DU-1A
Ignition coil D5AZ-12029-A DG-314

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