proportioning valve??

For use on 1969-74 A-body Mopar with drum or disc brakes.
the blk250 is this the 1 it looks just like the 1 on the car

Yes, it's the BLK250. I don't know why Inline Tube has it in two places (under BLK245 as one of two options) and then by itself under BLK250.

Here's what's listed under BLK245: "For use on 1967-74 A-body Mopar with either disc or drum brakes. If your Mopar had drum brakes you had the valve to the right and maybe the texas shaped rear hold off valve. Some Mopar's had the texas shaped valve and the distribution combine into one valve so your car may only have one valve or the two separate pieces, see BLK250 for the one piece valve."