thanks Sal for your good answer. Would you know if all stock exhast manofoils are the same. Or are they bigger for a 350 than for a 283? Thanks, John. BTW, You may have address this issue before. But would the 327 in a 1968 truck, have for sure 6 volts going to the points? And if I can find no condensir or any kind of piece between the coil and the starter. Would that mean that it is a 12 volt? Thanks, John.