COPO rear brake line setup

[JHS]

I am replacing the rear brake lines on a 69 COPO camaro and am not sure if this car had the same pressure regulator valve (I guess that's it's function) as the Z28, an in-line valve located underneath the driver's side floor pan. The car has a 05D build date, if that makes any difference. The current brake line setup does not have this valve but is a 2 piece line that mates under the driver's side floor pan rather than a 1 piece line from front to rear.