Used Mallory ZC 310 F small block dual point distributor. The attached pictures show this was for a 55-56 265 CI and 57-59 283 CI. It was probably also 60-61 283s. My HAMB research shows the following (see pictures): Z=centrifugal and vacuum advance, C=Breaker Points, 310=Chevrolet V8 and I think the "F" is the amount of advance curve but I'm not positive about that. I took this out of a 58 or 59 Corvette many years ago. The shaft spins freely and the vacuum advance holds vacuum. Still has the Mallory points in it. I also found the original condenser and added pictures below
The Jalopy Journal
