Rah ro raggy! Its the mystery machine! Ree hee hee hee! Sorry, couldn't resist. I don't know if that particular graphic is part of any special trim package. I've seen it before and I believe it is only found on the 1980 models. A line setting ticket, which can be ordered through IHPA would tell you for sure. It would also tell what axle gear ratio the rig came with originally. Keep in mind that axles do get swapped sometimes. The ratio identification tab May still be attached to one of the diff cover bolts. You'd have to slither under for a looksee.