hello again Piman; yes I implied that jump starting a Pos. Ground car with a Neg. Ground car was not possible, but back then I did not know that it could be done until you said it could, as long as the two cars do not touch. Right there is another good reason to standardize to Neg. Ground, the danger or causing damage to both cars if the cars should touch. Having said that, I understand why some people like you and Webserve prefer to stay with Pos. Ground. In the case of Webserve, his car is one of very few ever made, and there are good reasons to keep it original. In my case, my S type is a driver, (if it is not worth driving, it is not worth having), so converting to Neg. Ground was a necessity for all the reasons. But when you think about it, it makes little difference one way or the other, only at the Coil, the Generator, and the Battery. The rest of the electrical system does not, did not care about the conversion.