New Subscriber(s): Rich Madrak Email Address is: torfuelcells@xxxxxx Member Location: Connecticut Car(s) owned: 1959 Imperial LeBaron Self-Introduction: Hello: I have begun restoring a 59 imperial and have had difficulty finding reference to Mopar casting numbers. I am trying to identify 1851629-3. The block is also stamped with MR 413 and has the initials R.L. below casting nukmber. Does anyone know what I am dealing with here? Rich