Son JEFF bought a 550 with a dead battery. Dont know how much is true but installed new 12 volt battery using negative terminal as a ground. found a electrical drawing while surfing thru the Oliver forum. Shows it has a positive ground. Im confused, will the starter run forward reguardless of the polarity?  And what other problems could be cased by this error?  Also found proper way to connect electronic ignition, along with installing a S10 alternator that requires a home made bracket and it had pictures. My problem is didnot write it down and cant find it. Im sure I never got past page 28. Spent many hours and still cant find it. Witch battery terminal is ground and what lead goes to the distributer from the coil,neg, or pos? CAN ANYBODY HELP ME? It would be nice to hear from JOHN AND CRIS AND A FEW OTHERS THAT HELPED ME ON MY FOUR DIFFERENT  OC46S  CHARLIE.K Have a great day