Rear disk brakes To do or not to do?

Using the 11.75 front rotors is better bang for the buck. They made a HUGE difference on my car even over the 10.87 rotors.

In general, I have to drop the rear pressure by about 35% to keep the rears from locking first (wilwood proportioning valve), and that's with the typical 10x2.5 LBP drums with shoes and drums that are old enough I didn't buy them (figure 15+ yrs old). If you stay drums, there is literally no reason for anyone to use larger than the 10x2.5's