I am shopping for a new block for my 67 GT500. The car was built on Jan 18. How much earlier do you feel it would be ok for the engine to be dated?
We talk about cars, these guys below talk about engine blocks and date codes: 2-3 months prior should suffice http://www.network54.com/Forum/74182/
Here is some good information: http://www.mustangandfords.com/techarticles/15999_fe_quick_facts/index.html