Hughes cam?

Rusty, I found a note looking at cams yesterday that mentioned a Mopar 284 cam, but I find no description or part number in any of my old parts catalog. It also said it's very close to the Racer Brown ST-21, but I am not impressed with that cam. You have the specs on that 284 Mopar cam?
P4529343, 284/284 adv dur, 76 overlap, .528 lift,28/32 lash, 104 center line, 102 installed CL, P3412068 valve spring
From 1992 MP Parts book.