As its a diagonal split system I presume you know that by joining the brake lines you bypassing the split system ie if something happens to any of your brake lines you will lose all brakes except the handbrake (unless that's hydraulic too)
Wilwood has brake proportioning valves that appear to keep the lines isolated and therefore maintain the same level of fail safe. (i haven't read it all so I'll leave it to you)
http://www.wilwood.com/MasterCylinders/MasterCylinderProd.aspx?itemno=260-11179
Not saying not to do it that way, just you should be aware that's what's going on...
