rose jointing is a definite no-no in australia,were it is illegal to cut & weld suspension arms.though,funnily enough,a friend of mine once reverse sideswiped his 1200 at speed into a concrete wall,& because he had lock on at the time,the left front wheel hit the wall.this bent the crossmember,the chassis rail,the strut,the stub axle,the drag link & the castor arms,plus the steering arm & the ball joint suffered too.BUT,the welded,extended lower control arm was straight,& was used in the rebuild.another way to get neg on the front,particularly if going to bigger brakes,is to use 200b(810) steering arms.these are offset outwards(well at least they are in australia)& will give another 1 1/2 degrees of neg.you just need to change to datsun 180b(610) outer tie rod ends,which have the same thread as 1200 tie rods.