If it has bunks on it now. It wouldn't hurt any. I just don't know if you would gain anything.
I changed out my bunks for roller type bunks and did absolutely no good. Except maybe cleaning out my wallet a little.
Think about how you unload your boat. Do you float it off, or on for that matter? If so, slides won't do you much good. If you winch it onto the trailer they will help out.
Thats my experience.
If I haven't welcomed you to the forum. Welcome from Michigan.