Could do with some advice as what to check next. My 67 Mustang 289 ran like a dream until she decided to stop on the drive and has not started since. Checked the spark and it is very, very weak. so have renewed earth straps, coil, pug leads, battery and cables, swapped from points to electronic ignition and still will not start. Fuel is getting into carburetor OK and even Easy Start will not bring her to life. l would welcome any advice on what to do next.