[Singleton]

I found this info from Comp Cams referring to the instructions for the 31-1000 spider on using a special cam for Ford. They make a special line of Ford roller cams with a -RF, (Retro-Fit), at the end of the part number.

They don’t go into specifics concerning the measurements, but seem to imply that the cam lobe nose is indeed a lower radius than the cam journal to prevent the dogbone from making contact with the lifter body.
However, I’m not aware of any Pontiac camshafts made this way, or if they could be made this way. It would be interesting to test the different manufacturers of Pontiac roller cams by measuring the lobe nose radius against the cam journal radius to see if any of them are significantly different.