If you want a better cam that will still work with the SD there are a few good choices. I looked at that option before I converted my 87 to mass air. If your interested just try searching the site theres a lot of info to be found.
Roller cams are very rarely get worn out. Unless some really really bad happened, that I can see in the picture, then that cam is fine. The cam gear would be bad before a lobe wears out.