Hi Oz.....two ways to do this use a vice but the opposite ie use it to expand the wishbone or the way I did it is to apply some heat just above the weld joint on the outside then cool it straight away with a spray so it contracts quickly you will find it will gradually move over on repeated attempts.....you could even combine the two, I think the brackets are more important re positioning, like I say mine distorted a little after being welded and I think most others peeps will have as well
forgot I put it in my build thread here
http://www.haynes.co.uk/forums/showt...?t=4493&page=6