Lower Control Arm Rebuilding

I am rebuilding the front suspension on my 69 Barracuda. The lower control are shaft bushings are shot so I am replacing them with poly bushings. Is it recommended to change the control arm shafts and metal bushing sleeves when the shaft bushings are changed? I have seen a few articles in magazines and posts on this forum where the bushing sleeves were removed. What is the best process to get the busing sleeve, bushing and shaft back into the control arm? Getting them out has not been a problem.

Thanks