Engine model year

[lonzcllns]

My MKIV was built in Aug 1985 however the engine doesn't appear to be a 1985 model. Does anyone know where the date codes are on the engine block? I recently had to buy a new ignition coil and I had to get a coil for an '83 5.0 L Mustang HO to match my old coil.

[Rob.Hendriks]

Block casting code: looking aft the code should be cast at the block/starter motor interface at the 2 o'clock position
   Date code: should be below the block code and will probably be impossible to see without removing the starter
   Engine serial number: should be stamped or cast into the block about 4" back (mid-point of the starter) about 2 o'clock position. Ford reman block shown below
   
   Note:
   These numbers are a PIA to get to
   In all likelihood they will be covered in grime
   Try having the car on a hoist (engine/exhaust cold) and taking photos with a good mobile phone
   Try using a mirror
   Last resort - take the starter out
   
   All of this is possible if you are a skinny bugger like me and have a hinge part-way between wrist and elbow [:)]