273 special parts

Were there any Commandos with hydraulic cams and stamped rockers? I didn't think there was but.....
According to the 68 and 69 FSM

68 Plymouth no listing for a 4 bbl 273 or 318
69 Dodge no listing for a 4 bbl 273 or 318

It looks like 273 Commando died in 67 which makes sense with the introduction of the 340 in 68