[Ron Ramirez]

I couldn't say offhand about the wirewounds without studying the circuit, the voltages involved, etc.

Only by measuring the resistors will you know how stable/unstable they are at the present time. Personally, I don't trust any 60+ year old carbon composition resistors, and I would, as you say, "shotgun" all of the carbon resistors if I intended to use the 96 frequently, or semi-frequently.