I have a 1967 Mk111 Spitfire, finished building last year. Used all summer but last twice out in November, the car has stopped suddenly and refused to re-start . First time after 15 miles around the village roads, next time after less than a mile. Next morning, starts straight away. No fuel problem and going to change distributor to electronic. But it has been suggested that the coil could be at fault, because it gets hot!!. I used it in the summer when the weather was warm. Can this be so about the coil?