[cobrashoch]

blykins - as long as the bleeds are straight up it don't matter about the position on the rotor. Unless the pads (and calipers) are directional of course. Some of the 6 and 8 piston caliper stuff out there has to sit a bit lower, to the 8 or 9 o'clock position to make them work. I know rewelding the brackets to the classic 10 o'clock position is a pain and I wouldn't do that in your case unless you just wanted to, or the bleeds absolutely make you fit them there.
Rewelding the support brackets to the right position is a snap too BTW. All you have to do is hook up the brake line to the loose caliper, put it on the rotor where you want it and have someone hit the brakes. The caliper will lock down into the right position. Attach the support bracket to the caliper then tack weld and weld the bracket to the housing. It will automatically be in the right position! Job done.
Cobrashock

Amended - blyins, you must of fired off your final reply while I was on the tube typing up a reply. What was the final position of the calipers?
cobrashock