Hmmm....you are truly a car guy. What tipped you off to the fact that the Vette is a '78? The paint scheme?
Yes, the 928 is white with blue leather interior. Interesting combo, but it works fairly well. It is also a manual transmission. I've only had limited time to research these, but from what I can tell it is "rare" to find these cars with manual transmission. I don't have any hard numbers though.
I've got some work to do to this one.....TB/WP, all the hoses and belts (gotta a hefty coolant leak right now). Gotta buff the paint up....then I'll know better how the clutch is and how strong the engine pulls.