SBM "MagnaVelocity" mushroom camshaft.
I don't usually hang out in the smallblock forum ;) so I just came across this thread.
Back in 2019 or 2020, I had Schneider regrind my (B/RB) Mini-Express because some of the lifters weren't turning. They saved the lobe profile in their library and said they could make them on request. It does appear on their website as a LA cam (M-316F) which 12many linked in post #5.
Anyway it was originally
[email protected] with .654 lift, now it's
[email protected] with .652. It works great in my 451, but it'll be a whole lot of cam for a smallblock even if stroked to 408...