Interesting. It appears to have the front of a 3.0 slab and reverse of a 4.0. So I guess that would make this a 3.5? Guessing circa early 1990.
Nice Fatty Hambone. Too bad the sticker on the reverse is scratched. Some dealer must have had a price tag right there. They could have put it anywhere else, yet they chose to stick it to the sticker.