My girlfriend just pulled a 67 valiant out of barn where it was parked in 1974. The car has the original slant 6 and automatic The engine turns if we jump the starter with a screwdriver but not when we try the key. So far we have done new battery, battery cable on both sides and a coil. Old coil was cracked. All the fuses are new. Can someone please point us in the right direction to get the key working? Thank you for taking the time.