Wally, its got both vacuum and mechanical advance. The octane selector is on the vacuum advance....not sure where to set it, though. Yea, rust free is kinda rare up here but an old guy had it so he probably took pretty good care of it. Plus it was ziebarted.....which isn't going to be fun taking off when I decide to restore it!

1955 Chevrolet 210 2 door Sedan
a 30,000 mile UNMOLESTED original, now my daily driver! Original 6 cylinder with a rebuilt '66-'69 Saginaw 3-speed Overdrive. Synchro low! Otherwise, everything original down to the spare tire. Interior is like new. Needs paint, but absolutely zero rust.