Will the work for 4 wheel disc

The valve you posted is the stock valve for a disk/drum car.

The adjustable valve that you were sent as part of your kit would be better, because it's unlikely that your rear disks were actually chosen to brake the car evenly with your front disks. The fact that you ordered a complete kit, and they didn't make the lines to include the adjustable prop valve, is poor business. If they're selling a complete, bolt on kit it should do exactly that with all of its included components.

There have been folks that have had good luck just running a distribution block. That basically just sends equal pressure to all 4 corners, and the front/rear bias adjustment is set by the calipers and rotors. Can it work? Yep, it can if the calipers and rotors match the braking needs of the car. But that depends on weight balance, tire stagger, all kinds of stuff. Can running with just a distribution block mean your brakes are biased incorrectly? Yep, that is definitely possible.

I would run whatever your brake lines fit to start off with. If it works, great. If it doesn't, well, you may need to have some work done.