Foot pedal e-brake and C5 rears

[WSSix]

Has anyone retained their factory foot brake while hooking up to C5 rear parking brakes? I'd like to retain my pedal instead of switching to a hand pull but I'm not sure I'll be able to. My thoughts where to get 4th gen LS1 cables since they are longer than C5 cables and have the proper brake connections at the ends. I was wanting to run straight down the side of the car and then route the passenger cable up and over the exhaust and drive shaft after it gets into the rear area where there's room. I'm not sure this would work since the driver's cable will be short and running almost straight back to the caliper while the passenger would be much longer and make all sorts of bends to get over to the passenger side. Granted the cable is inside a sheath that will be restrained along the way so it might work but I'm just concerned about the length differences. I believe I can mount the C5 parking brakes with the pull going towards the front. Any suggestions or experience is appreciated.

Thanks!