proportion valve lines

I have an 87 xj with 79 F-250 axles under it with discs all around. I picked up a master cylinder out of a 95 zj to swap in. Thing is my proportion valve on my 87 has one extra line coming out the back and the 95 's doesn't. What do you do with the extra line?

how many lines total coming out of eact prop valve??

The 87 has 5. 2 on top 2 on bottom and 1 out the back. The 95 has the same except nothing coming out the back. Could I keep the 87 valve but swap the master out and get better pedal response?

I think the 95 prop valve has one outlet for the rear and one for the front, with a T after the prop valve for the front lines. Just need to add a T in there.