What RPM are you checking for rmax timing? Is this distributor stock or has someone modified it to get all the mechanical advance in early with light springs? Do you know either way? If not find out first so we can give you good advice on this BTW, I've never had a Mopar V8 engine, from 1955 up to 1976 year model, that the vacuum advance hooked up like stock, ported vacuum,would work on in neutral, no matter what RPM I revved them to
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
