Purple Shaft Cam for small block

The 284-484 cam was one step above the Hemi Grind. The real early Hemi Grind had 284-474 and somewhere along the line changed to 280-474 if my memory serves me right. I have my real old Direct Connection books packed away some where that would show this. They were sold cam only, no lifters. I put one of the early ones in my 68 GTS 340 4 speed with 3.55 gears. I always thought it was the perfect cam back then. I would be interested if it was either of the Hemi Grinds if no one else gets it.