Hmm, I recall that my 1964 Dodge Polara 500 had a Hurst shifter but the arm did not have “HURST” on it like later years. The Hurst logo was on the body of the shifter. So was it non-factory?
‘64 & ‘65 used Hurst Competition Plus shifters with the stops for the lever arms. ‘66, ‘67 and most of ‘68 used Inland shifters. I believe that they changed back to Hurst in late 68 and by ‘69 and forward they were all Hurst.