302(5.0l V8) Engine Swap
in 75-78 Mustang II all models

(from 2.3l I4 or 2.8l V6)

Items to remove from car

Engine assembly 2.3/2.8
Power steering hoses, both pressure and return to rack and pinion
Engine bay wiring harness
Wire from starter solenoid to starter 2.3/2.8
Transmission assembly and attaching wiring i.e. neutral start safety switch and reverse wiring
Kick down rod, crossmember and transmission mount
Speedo cable and plastic driven gear assembly
Driveshaft assembly (auto and manual)
Drivers side motor mount frame support
Accelerator cable linkage (gas)
Rubber fuel lines from steel line on inner fender to fuel pump
Radiator, fan shroud and mounting brackets
A/C forward of the firewall
Auto transmission cooling lines 2.3/2.8
Rear axle assembly 2.3 only (needs an upgrade)
Fresh air tube to air cleaner assembly 2.3/2.8

Items to be reused from removed parts

Neutral start safety switch from the automatic trans
Single 2.3 74/78 or dual hump crossmember from 2.8 74/76
Right hand motor mount frame support
Reverse switch wiring harness from manual trans
Automatic or manual trans shifter /selector 2.3/2.8
8 inch rear axle from 2.8 (2.3 will require an 8" axle upgrade)
A/C pump assembly
Alternator assembly 2.3 /2.8 standard and hi output
Alternator harness
Battery to solenoid wire HOT
Coil from 2.3/2.8

Mustang II 5.0 items needed to bolt in without modifications

Left hand motor mount frame support
Right and left motor mounts 5.0 75-78
Auto or manual driveshaft 5.0 2.8 75-78
Exhaust system 75/76 dual or 77/78 single exhaust
Accelerator cable from 75-78
Oil pan assembly and pick up tube from 75-78 5.0
Automatic transmission (C-4) from 75-78
Manual transmission from 76-78 5.0 including clutch cable
Manual transmission pedal assembly from 2.3/2.8 and 5.0 same 75-78
Radiator from 75/76 or 77/78 5.0
Transmission cooling lines from 75-78 5.0
Fan shroud from 75/76 or 77/78 5.0
Automatic kickdown rod from 5.0 75-78
Tach assembly 75/76 orange dials or 77/78 yellow dials
Tach reducer assembly located behind tach assembly 75/76 white 77 blue 77/78 black
5.0 Engine wiring harness ¹
Rear Axle assembly from 75-78 2.8 or 5.0 (for replacing the 2.3 only)

Notes:
¹5.0 Engine wiring harness must match to build date month and year on the dash harness. Dash harness Part Number is located on wiring loom tape next to fuse box above steering column.

Dates Used	Ford P/N
1975 before 1/20/75	D5ZZ-14290-D
1975 after 1/20/75	D5ZZ-14290-G
1976 before 3/1/76	D6ZZ-14290-D
1976 after 3/1/76	D6ZZ-14290-H
1977 before 6/27/77	D7ZZ-14290-H
1977/1978 with or without A/C and heated back glass from 6/27/77	D8ZZ-14290-D

If you are not able to match the engine and dash harness, the motor will not turn over. A 2.8l engine harness will work but will require relooming and re-arrangement of the engine harness. This can be labor and time intensive to achieve a factory appearance.

Information provided by Phil Schmidt
Mustang II Specialty Shop
90 Glenhaven Road
Phenix City,Al. 36869

302(5.0l V8) Engine Swap in 75-78 Mustang II all models

(from 2.3l I4 or 2.8l V6)

Items to remove from car

Items to be reused from removed parts

Mustang II 5.0 items needed to bolt in without modifications

302(5.0l V8) Engine Swap
in 75-78 Mustang II all models