New Camshaft in '66 427 Block

[Thomas]

I am in the process of replacing the camshaft in the 427 block currently in my '69 Camaro engine bay.

The block is a '66 4-bolt out of a '66 Pontiac Parisienne. It originally used a camshaft with a "grooved" rear bearing journal.

Obviously, none of the new cams come this way.

The rear cam bearing, presently in the block, is grooved.
Do I still need to have a groove machined in new camshaft in order for it to work with this block?
I believe the answer is yes, as using the camshaft as is will not allow the lifters to be oiled properly, but I have been unable to verify this.

I know there are members on this site who have forgotten more about engine building than I will ever know.

Thanks in advance.