Vintage MP electronic distributor on street driven car ?

As I understand the original, non Mallory/Accel Mopar distributor they sold as a conversion kit to electronic ignition was just a stock distributor with adjustable vac advance. So really which ever one of the two you have that is less worn out and functional I would use. This is leaving out which ever either is set to for internal timing to set your total timing that would be best for your engine.