X2 on what Brett said. The subframe might not be bolted onto the car straight. You can take measurements to verify this. You can take a measurement from the center of the rear wheels to the center of the front wheels, if one is shorter then you know the subframe is not on correctly, also you can take measurements from the pinch welds underneath inward from the rocker panels from around the front of the front doors to the outboard side of the subframe. So take a couple measurements from the pinch weld to the outboard side of the subframe on one side and then do the other side. All the measurements should be the same from the pinch weld to the subframe from side to side, if it isnt then your subframe is canted on the car or sitting further to one side then the other or a combo of both. Dont let them replace a subframe untill you have or they have measured it to make sure it isnt just an alignment problem with the way it is sitting on the car. You can also take all kinds of measurements to figure this out, but in my opinion, the pinch weld measurement will give you a good idea if the subframe in not sitting straight on the car. And if it isnt then you have to do what Brett said and loosen all the stuff, and try and get the subframe straight on the car. This will fix a lot of issues, that maybe you havent seen yet. I cant give you an answer about the brake calipers and wheels, as I am not familiar with the 68 items even though they may be close to what I have on the 69, but I thought the 68 came with different calipers then the 69 have.