Line Lock Installation

I don't have a line lock but may be interested in installing one. The rear setup sounds cool because you don't see it. I have separate lines from the master cylinder to the front and rear brakes. My adj proportion valve in at the rear of the car.

Wonder if it is better to put the line lock before or after the prop valve in the rear. Or is the install simpler up by the master cyl. That area is already crapped on my car with the hydraulic clutch slave cylinder/reservoir and all.

Since it's a 5-spd i would think that I only need it for burnouts right?