I have 50 lb PP on my 975. Great casting - usually use it out of a boat casting or drifting.
ANY conventional reel with a levelwind can wind on super braids! I put 50 lb PP on a Penn 209 & 309 and it was FINE. It is just the spinning reels that have the issues w/ braids.
Lots of CA boats use the 975 for schoolie tuna. Drags strong as are most Penn drags.