[Greg Reimer 7376]

In my years of A bodies,I learned a thing or two. In the world of 64-72's, the pittman arm is dimensionally the same, even the part number forged into it is the same. these are forged, not cast, for obvious reasons. The difference is that the 66-67 Pittman arm has a larger diameter tapered hole at the drag link. The 66-67 drag link has a larger diameter tapered pin at the end of the drag link. '64-65 and 68-72's will interchange perfectly.Make sure the drag link for the car is the correct year for that series, 64-65 66-67, or 68-72. The length will vary. If you put a 66-67 drag link on your 68-72 and try to compensate for the length difference with the tie rod adjustment, you will have problems.You might get the toe in and straight line ahead adjustment just right, but when you try to steer the car, the geometry goes out the window and the two front wheels won't even begin to follow each other, poor steering, tire wear and noise will occur, and it will not be obvious right away as to what caused it. The swivel joint on the drag link at the pittman arm joint is smaller in diameter than the 66-67,so noticeable looseness there will also be the result. Just make sure that the Pittman arm from the steering box and the drag link are the correct year for the car. I don't know if the S-10 truck Pittman arm dimensions are the same as to its length as the 68-72 Chevelle ,but if it's not, that same geometrical issue would surface. I bought three manual steering Pittman arms at a swap meet once for $20 each, got them home, they all had the same factory part number, but the small end dimensions of the hole for the drag link were not all the same. This stuff is starting to be available from OPG and other Chevelle restoration outlets. Just don't accidentally crossbreed a bunch of parts and create a mess.