Ford engine code decode and ID

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Mustangtek Differential and  Transmission Ratio Calculator

 

FORD and Mustang Crankshaft     ( 6303 )

1M

Ok 62-64 221 260

2.87" Stroke

Rod 2.1232" - 2.1240"

Main 2.2482" - 2.2490"

1M

Ok 63-68 289

2.87" Stroke

Rod 2.1228" - 2.1236"

Main 2.2482" - 2.2490"

C3AZ-6303-F

1M

289 HIPO

Ok 63-67 289 HiPo

2.87" Stroke

Rod 2.1228" - 2.1236"

Main 2.2482" - 2.2490"

high nodular

C30Z-6303-B

1MA

Ok 63-68 289

2.87" Stroke

Rod 2.1228" - 2.1236"

Main 2.2482" - 2.2490"

C3AZ-6303-F

1U

428 CJ SCJ

Ok 66-70 428

Ok 68-early 69 CJ

3.984" Stroke

Rod 2.4384" - Main 2.7488"

C6AZ-6303-B

1UB

428 CJ SCJ

Ok 68-69 428 CJ b4_26/dec/68

3.984" Stroke

Rod 2.4384" - Main 2.7488"

C9ZZ-6303-B

1UB (A)

428 CJ SCJ

Ok 69-70 428 CJ From_26/dec/68

3.984" Stroke

Rod 2.4384" - Main 2.7488"

"1UB" with "A" markings

C9ZZ-6303-E

1UA

428 CJ SCJ

Ok 69 428 SCJ b4_26/dec/68

3.984" Stroke

Rod 2.4384" - Main 2.7488"

requires cookie cutter

C9ZZ-6303-A

428 SCJ 1UA

1UA (B)

428 CJ SCJ

Ok 69-70 428 SCJ from_26/dec/68

3.984" Stroke

Rod 2.4384" - Main 2.7488"

"1UA" with "B" markings

requires cookie cutter

C9ZZ-6303-D

2M

2MA

Ok 68-73 302

3.00" stroke

Rod 2.1228" - 2.1236"

Main 2.2482" - 2.2490"

Regular 302

C8AZ-6303-A

2T

Ok 64+ 352

3.50 Stroke

Rod 2.4384" - Main 2.7488"

C4AZ-6303-L

2U

Ok 66-69 390 GT

3.78 Stroke

Rod 2.4384"

Main 2.7488"

C6AZ-6303-A

2Y

Ok 68-78 460

3.85" stroke

Rod 2.500" - Main 3.000"

3M

Ok 69-72 351W

3.50" Stroke

Rod 2.3103" - 2.3110"

Main 2.9994" - 3.0002"

C9OZ-6303-A

3MA

Ok 73-79 351W

3.50" Stroke

4M

Ok 70-74 351C

3.50" Stroke

Rod 2.3103" - 2.3110"

Main 2.750"

D0AZ-6303-A

4M

Ok 75-81 351M

3.50" Stroke

Rod 2.3207" - Main 2.9998"

4MA

Ok71-72 351 C

3.50" Stroke

Rod 2.3103" - 2.3110"

Main 2.750"

If D1ZX stamping then Boss 351

4U

4UA

Ok 68-79 429

3.59" stroke

Rod 2.500" - Main 3.000"

5M

Ok 72-74 400M

4.00" Stroke

Rod 2.3103" - 2.3110"

Main 2.9994" - 3.0002"

C0AE-A

C0AE-D

Ok 60 352 High Performance

3.50" Stroke

Rod 2.4384" - Main 2.7488"

Heavier Counterweights

Grooved journals

C0AE-B

Ok 60-62 352

3.50" Stroke

Rod 2.4384" - Main 2.7488"

 

C1AE-A

Ok 61 390

3.78" Stroke

Rod 2.4384" - Main 2.7488"

C1AE-B

C1AE-H

Ok 61 390 High performance

3.78" Stroke

Rod 2.4384" - Main 2.7488"

Heavier Counterweights

Grooved journals

C2AE-B

Ok 62 390 High performance

3.78" Stroke

Rod 2.4384" - Main 2.7488"

Heavier Counterweights

Grooved journals

C2AE-D

Ok 62-63 406

3.78" Stroke

Rod 2.4384" - Main 2.7488"

C3AE-A

Ok 63 352

3.50" Stroke

Rod 2.4384" - Main 2.7488"

 

C3AE-B

C3AE-C

C3AE-E

Ok 63 390

3.78" Stroke

Rod 2.4384" - Main 2.7488"

C3AE-G

427

Ok 63 427 High performance

3.78" Stroke

Rod 2.4384" - Main 2.7488"

Cast iron

C3AE-N

? 63+ 289

2.87" Stroke

C3AE-U

427

Ok 63 427 High performance

3.78" Stroke

Rod 2.4384" - Main 2.7488"

Cast iron

C4AE-A

C4AE-E

Ok 64 352

3.50" Stroke

Rod 2.4384" - Main 2.7488"

 

C4AE-AJ

427

Ok 64 427 High performance

3.78" Stroke

Rod 2.4384" - Main 2.7488"

Forged Steel

C4AE-B

427

Ok 64 427 High performance

3.78" Stroke

Rod 2.4384" - Main 2.7488"

Cast iron

C4AE-C

C4AE-D

Ok 64-65 390 Police Interceptor

3.78" Stroke

Rod 2.4384" - Main 2.7488"

C4AE-H

427

Ok 64 427 High performance

3.78" Stroke

Rod 2.4384" - Main 2.7488"

Forged Steel

Cross Drilled

C5AE-A

C5AE-B

Ok 65 352

3.50" Stroke

Rod 2.4384" - Main 2.7488"

 

C5AE-C

C5AE-6090-C

427

Ok 65+ 427 High performance

Ok 65 390

3.78" Stroke

Rod 2.4384" - Main 2.7488"

Forged Steel

Cross Drilled

C5JE-A

427

Ok 65 427 Marine High performance

3.78" Stroke

Rod 2.4384" - Main 2.7488"

Cast Iron

C5JE-B

427

Ok 65 427 Marine High performance

3.78" Stroke

Rod 2.4384" - Main 2.7488"

Cast Iron

Reverse rotation

C6AE-A

C6AE-C

Ok 66 390

3.78" Stroke

Rod 2.4384" - Main 2.7488"

C6AE-B

C6AE-D

Ok 66-67 352

3.50" Stroke

Rod 2.4384" - Main 2.7488"

C6JE-B

C6JE-C

427

Ok 66 427 Marine High performance

3.78" Stroke

Rod 2.4384" - Main 2.7488"

Cast Iron

C6JE-D

427

Ok 66 427 Marine High performance

3.78" Stroke

Rod 2.4384" - Main 2.7488"

Cast Iron

Reverse rotation

C6ME

Ok 66-67 410

3.98" Stroke

Rod 2.4384" - Main 2.7488"

C8AE-A

C8AE-B

427

Ok 68 427 High performance

3.78" Stroke

Rod 2.4384" - Main 2.7488"

Cast Iron

C9AE-A

Boss 429

Ok 69 BOSS 429 w/engine tag 820-S (NASCAR)

3.59" stroke

Rod 2.500" - Main 3.000"

Forged steel

Cross drilled

C9AZ-6303-A

C9AE-6303-B

Boss 429

Ok 69 BOSS 429 w/engine tag 820-A OR 820-T

3.59" stroke

Rod 2.500" - Main 3.000"

Forged steel

Cross drilled

C9AZ-6303-B

C9AE-C

Boss 429

Ok 70 BOSS 429

3.59" stroke

Rod 2.500" - Main 3.000"

Forged steel

Cross drilled

C9AZ-6303-C

C9ZE-6303-A

Boss 302

Ok 69 BOSS 302

Steel

Cross drilled

3.00" Stroke

Rod 2.1222" - 2.1230"

Main 2.2482" - 2.2490"

C9ZZ-6303-A

C9ZE-6303-C

Boss 302

Ok 69 BOSS 302

Steel

Cross drilled

3.00" Stroke

Rod 2.1222" - 2.1230"

Main 2.2482" - 2.2490"

C9ZZ-6303-A

D0ZE-6303-A

Boss 302

Ok 70 BOSS 302

Steel

Cross drilled

3.00" Stroke

Rod 2.1222" - 2.1230"

Main 2.2482" - 2.2490"

D0ZZ-6303-A

D1ZX-AA

BOSS 351 Mustang

Ok 71 BOSS 351

 

3.50" Stroke

Rod 2.3103" - 2.3110"

Main 2.750"

D1ZZ-6303-A

Application

legend

  Shelby Mustang 289 HIPO 428 CJ SCJ Boss 429 BOSS 351 Mustang Boss 302 427

Certified Confirmed App

Ok Unconfirmed App

? Unknown App