new-info-about-front-disk-brake-convers ... 03332.html
This might be what you are looking for. I haven't tried it yet, but I'm going to soon. I wish they'd post pictures of the proportioning valve and how/where they mounted it. But I guess you could actually mount it anywhere. Were your brakes working good before the new calipers/pads? Or did you just do a conversion from drum to disc? I just did the conversion, and I'm still working out the kinks to get the brakes to work.
Please post any news or updates on the issue if you solve it. This topic on the forum has a lot of views... but the post with solutions seem to be far and few. So either everyone is driving with bad brakes, or they figure out the solution and forget to post it for others to learn.