1972 dart - stopped running while at 50 mph ? no warning

George Jets said
The Hot Wire to the coil is just isolating the Power from your car in case you have ignition wiring problems up the line with the ignition system.

tried it again with the remote starter switch , it just cranks , no start . using small alligator clip lead though for the hot wire , do i need like jumper cables or something bigger than these ?