While searching for the date code on the 302 in my 56 Ford F100, I found what I originally thought was a date code of E7TE, but the number wasn't in the correct format and further investigation led me to this information from the LMR website:

"1987-1992 FOX BODY MUSTANGS
In 1987, there were more changes to the 302. The short block featured a redesigned forged piston with a 30-thousandths deep dish and valve reliefs which netted a 9:1 compression ratio. The cylinder...

Casting number E7TE