The info at this link does show that J is 73, but I understand that 413's were not in production in 73.
On Wed, Aug 2, 2017 at 5:05 AM, Ivan Regös ivan.regos@xxxxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:
The engine in mine 300 1962 is a 413" and has been taken out for water has come in to the oil and other problems. To be on the safe side I have start looking for an other engine. Found one with this written on it: J 413 TH. 1016. I have not seen it in real, so I wonder can someone tell me what these markings meen. The odd thing is that the guy sais it´s from 1972 but surely the last 413" was in 1965 and then came the 440".
Sincerely Ivan from Sweden...