RE: Bear Cub 48# longbow
I had a '57 Cub semi-recurve for a while, until somebody wanted it worse than I did and had the money to prove it. They aren't worth much except as shooters, so no worries about ruining a collectable. They're not as good a bow as a Kodiak or Grizzly, of course, but they'll do the job.
Whether or not it's draw weight is too much depends entirely on you. If you can draw it and hold a solid anchor for 15 seconds, you should be able to do well with it.