Im thinking of drilling out the thread, and fixing with a nut either side for easier and better adjustment of camber, good idea??

The problem may be the thickness of the threaded section after drilling it out to accept the camber adjustor will be reduced to the point of weakening the wishbone? If that makes sense?

Why not sell the wishbones, and get an adjustable set from GTS or simmilar suppliers.

How often are you thinking of adjusting it ????

Pat...