Lore-wise, pretty much any Spheroid - inner or periphery - would have the opportunity to see the Light of Blake. But it'd be pretty unlikely for a Clan Warrior to 'convert'.
Now I could see Clan lower castes, in territories reclaimed by Bulldog, being taken in by the more secular ComStar post schism. But with WoB's inner core planning an anti-clan sucker punch with nucs, bio, and cyborgs ...
That said, I could imagine Clan castemen, even a failed Warrior or three, being very showily inducted into WoB, and used as propoganda shills - "see how the truth of Blake redeems even the most hardened gene-freak!" Perhaps even used for opfor training. But trusted ... nope.
Which would be a great story hook, when the dupes realise exactly how they've been played ...
W.