Just get a new replacement electronic type that looks like the points one.My kid has one in his 413 and with MSD and big stereo it cranks right up all the time.I did the dual field change on my 65 and his charges just as good even with the 62 alt still on in.If it wants to crank hard a different alt wont fix your problem unless it barely charges.Ive used the new replacemebt type reg on 4 cars and they all started and charged like a new car.The blue reg is a race unit and will not just bolt in on a older car.Rocky