Brake Hub help please! Sbp to bbp

Question - is this a factory small bolt pattern disc brake setup in front, or an aftermarket SBP disc conversion? Would help to know what equipment is already on the car.

The A-body SBP upper control arm balljoints fit in a socket; it's not possible to modify it to accept the larger balljoint.

Might even make sense to put on some caster-adjusted tubular control arms on, if you can find them. Might be double the cost of the factory units, but then there's no worry about needing offset Moog bushings (which are also overpriced).

-Kurt