hello bud .... nah not had enough time to have a look at it yet but i'm thinking subframe bolts possibly or steering rack ..... can't see it being the calipers BUT it could be .... seems to be when going nearly full lock in forward or reverse and not always doing it .... has had a clutch before i got it so subframe is a possibility
Check the big lock nut that secures the outer cv joint to the hub. I'd bet they reused one or both when the clutch was done (they're single use only) and its backed off causing play in the cv to hub when on lock. Incidentally I speak from experience as I had exactly that happen to me, sounded truly broken when it made the noise!