Iowa mike,
I shot some of those old bows too, been doing this for over forty years. The new bows are by far more superior in workmanship, and efficiency. These bows can be of lighter weight and exceed the efficiency of those older bows.
With the arrow materials available, DynaFlight bowstrings, you can shoot heavy arrows at speeds only dreamed of in the "Good Old Days".
Depending on your States game department laws, you might want to get back into it with a 40pound draw weight. Here in Texas, that is the min. to hunt big game of 40 pounds. My girlfriend is knocking the fire out of everything she shoots with a 40 - 44 pound longbows.
The last pig she shot, nearly had a complete pass-through, going through a ham in to the body cavity.