My first Mopar car was a 1959 Dodge Coronet with a 326 C.I. poly motor(one year only, Dodge used the 318 poly motors after 1959) and a Powerflyte 2 speed tranny.
I remember the other 1959 Dodges with BB in them were either "Royals or Custom Royals, not Coronets
Is this a 2 barrel or 4 barrel motor?
It should have four bolt valve covers with aluminum rocker arm shaft hold down if it is a pre 1964 361 motor
I'm not sure when Mopar, all brands, stop using the 361 and 413 motors in the passenger cars