Hi there, I have just replaced the upper inner bushes and noticed that the new bushes I got from Dennis Carpenter are made in China and do not have a shoulder/step on the outer metal sleeve like the originals. 
I have positioned them as best I can but if the arm is slightly too far forward or back as a consequence of not placing them correctly, will this affect my wheel alignment?
Also, I noticed that from 58 onwards Ford started using threaded bushes. Would any of you guys recommend I change to the later arm and shaft/bush or should I stick with what I've got.
Regards

ken