Where is the engine number on a 1965 Mustang?

Answer 1

It is located on a tag attached under the coil mounting bolt, all 1964-1970 models had these tags. The tag included displacement, assembly plant, model year, change level, engine code (useful in identifying high performance engines) and date of production.

These are easily lost or sometimes replaced with fake tags so rely on them at your own risk, there is a block identification type stamped on the block where the starter bolts up but it will not tell you the cubic inch displacement of that particular engine as several different displacement combination's were made from the same block.

The 221, 260, and 289 were originally made for the Ford Fairlane and built in the Cleveland engine plant from 1962-1965. The 1964 289 casting number for all 289s was C4OE-6015-C (later blocks had an F suffix). In 1965, this number was changed to C5AE-6015-E for the 289 2V, 4V and Hi-Po.

Cylinder heads have their own identification numbers.

1965 model 289 Head - Head casting number is located under the cylinder head.

It must be removed to see it.

The Date code location is under the valve cover.