brake proportioning valve for 73 duster

I thought those two were different for some reason. I'm switching my car to disk brakes and I thought I needed the disk brake type valve. I know that the one I have looks just like the one I have on my car now (drum brakes). If I can find out for sure if theyre the same I'll sell you the one sitting on my workbench. I removed all the fittings and all the threads are good. Its has the pressure warning switch on it too.