ok as some of you know I did the 5 bolt 03 cobra brakes on my 88lx. My ? is, when I got the prop valve screwed all the way out "fully open right" I can't get my rear dics to lock up before the cobra fronts do. I've ripped all the guts out of my stock 4cyl prop block and I'm still running the 3 port 4cyl master cylinder if that matters at all. I've got a 95 cobra brake booster on it though. I mean don't get me wrong, the thing will put you face in the windsheild just about, but I'm just trying to tune in the rear brakes better. Any thoughs or did I confuse everyone.