I actually found a source, but have not verified yet, that you can just remove the internal proportioning component. That will remove the 60-40 split or w/e the split is for rear drums/front disks. Rear disks need more fluid. Everything else in the system, ABS, remains intact.

 

Wow huge difference between what they were before with it set up this way and yes you could leave the abs intact but it doesn't do anything anyways. At least mine was useless as it was rear wheel only.