The casting numbers on Ford engine blocks are located forward of the starter bolts to the bell housing, according to Classic Mustang. In some cases the starter will need to be removed in order to identify and correctly read the numbers.
- Park the vehicle on a solid, level surface
If the motor is still in service and the vehicle is still functional, but you are in need of casting numbers, ensure that the vehicle is parked on a solid level surface such as a concrete slab.
- Jack-up the front of the vehicle
Locate appropriately rated floor jacks. Refer to the operator's manual to locate proper jack placement. Place the jacks under the vehicle and raise the vehicle to a suitable height. Leave enough space under the vehicle to allow for free movement.
- Secure vehicle and move under it for inspection
Once the vehicle has been raised to a suitable height, secure it with properly rated jack stands. After completing this task, crawl under the vehicle. Position yourself on the starter side of the engine, and ascertain the location of the starter bolts to the bell housing.
- Shine a flashlight on the side of the engine block
With a flashlight, shine the light on the engine block just in front of the bolting holes used to mount the starter. The casting numbers should be visible, reading away from your position. It can be beneficial to have someone available to write these numbers down as you read them off. If you can't read the casting numbers, remove the starter unit.