Diamcomp 982s I believe? Or something like that? If it had 700s before there will be no problem. The other way to get the pads a little lower is increaseing the yolk cable length (or droping the yolk in the front, which it looks like you have room for) and extening the pad out, it's miniscule but it works. My advise is also to switch to an old triangle deore canti-lever, I held onto my dia-comps for a long time but then I used a deore and it was so much easier to adjust and I found gave better breaking power.
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1 Super Record bike, 1 Nuovo Record bike, 1 Pista, 1 Road, 1 Cyclocross/Allrounder, 1 MTB, 1 Touring, 1 Fixed gear