Tony,
Read this thread on another forum.......
Opinion on Casting Number - Ford Forums - Mustang Forum, Ford Trucks and Cars
This guy had the same block ID number and it turned out to be a mexican block.....
Is the deck height taller than what it should be i.e 8.246", not 8.206"????
Do you see the words "Hecho en Mexico" cast anywhere on the block, the lifter valley perhaps?
If there is two large boses protruding from casting, one on each side at the front then its a mexican.
Regards
Andy