Commando cylinder heads P4876785

388dart,
The mods that they are talking about are the offset shafts, they will have to be bought, the only people that I know of that sells good shafts is Harland Sharp when I talked to Randy @ Harland Sharp he told me that they are thicker than the regular aftermarket stuff and more durable, he assured me that they would be the last set of shafts that I would have to buy. They are a bit heavier, but they are not moving so I didn't see any harm.