I looked it up in the '68 Plymouth Service Manual.
I have two original 340 cars, one '68 and one '71, both auto. I recognized those numbers as the auto cam.
I've always wanted to get a hold of an original 68 4 speed cam just to see how much different it runs from the auto cam. They say it isn't good for power brakes due to low manifold vacuum. One of my cars does have manual brakes....
Someone should contact Moparts and let them know that they have some wrong information so they can correct it.