when i fitted non gen arms, i got new vag bolts, but when fitted it was like they was too long and hit the body on the other side, so they gave an impression of tight, but they was some movement, and it knocked when pulling away and stopping... then i realised what the washers were for that came with the wishbones...

but it doesnt sound lke this is your problem, looks like you need to find a skilled welder...