Pro Flo 4 Timing
Thinking about this a little more, the SB Chev PF4 Distibutors that I’ve seen (and maybe others) do in fact use the replacement rotor that Edelbrock specify (see photo below) To me it looks like this rotor is broader than the SBM (OE Chev based) rotor, this may explain why this issue is Mopar specific.
Anyway, we’re the lucky ones if we can buy an adjustable rotor and phase it’s position accurately!
Thinking about this a little more, the SB Chev PF4 Distibutors that I’ve seen (and maybe others) do in fact use the replacement rotor that Edelbrock specify (see photo below) To me it looks like this rotor is broader than the SBM (OE Chev based) rotor, this may explain why this issue is Mopar specific.
Anyway, we’re the lucky ones if we can buy an adjustable rotor and phase it’s position accurately!