Thanks for the link and I apologize for my lack of information. It is an original disk/drum set-up and I was searching last night and on Inline Tube's website said the following when talking about the correction valve under the door:

This valve was not used in every factory disc brake car, but would make the front to rear line two pieces with the valve usually found mounted near the floor pan of the car. An original 1967-70 disc car can be factory correct without the correction valve, but not without the hold-off valve at the master cylinder

So I am guessing that may be what this car was originally and I should abe ordered the one piece line or just order the vavle that you sent the link for and be done with it.