Is there different pitman arms for 1972

Part of your last sentence is the key here. No way to get the pitman arm installed wrong and still be able to attach it to the center link. You just need to adjust the tie rods to where the steering wheel is centered. The fact that they probably were never even in length on your car is not unusual. These cars have all sorts of uneven welds and assembly variations. It doesn't take much adjustment on the tie rods to get the wheel centered again. It's not a jury rig or half *** repair, it's just the way the car was built.