As Grigg stated above do a search by dimensions. First identify the degree and lenth of the taper in both the pitman arm and the steering arm. If they are the same you can remove the pitman arm pretty easy and take it to a parts store where you can use it to find ends that fit well. Once you find ends that fit buy one with left and one with right hand threads. Then get your self a piece of DOM tubing the appropriate Length and diameter. The length of the tubing should put you at about 3/4 of the way on the threads of each rod end with the wheels straight and pitman arm at its center of travel. Have this tubing threaded for the the ends you bought put a split in the each end and get the proper clamps. If you build your drag link like this the exact length is adjustable and you should never have trouble centering your steering wheel.