go to bloodydecks.com and post this question on the avet forum and you will get many replies. i personally havent used that rod but have both of those reels. the west coast guys are seeker and calstar enthusiasts, you will get your answer.
That means 15-25# drag, which we'll assume your reel will provide in good, smooth fashion. But, that does not mean you should expect to be in control of your fish at the high end of that drag range. With luck, you might land your oversize, structure-loving AJ with no more rod than that; it depends on how close he is to structure and which way he happens to turn. Can you enjoy fishing a 60# rig, sure. And, if it's what you've got; that's what you use. You may get a fine AJ and a great story. Jerry's 70# AJ shows what you can do and would be a great catch on that tackle.
But, if you're looking for an excuse to get a heavier rig, pulling donkeys off structure is your excuse.
I have a 660XH and had a Avet 4/0 for it. The rod worked fine. That is a very nice blank and it is fiberglass. You can bend that sucker in half and it won't break. It has a pretty parabolic bend, so just keep pulling harder and harder IMO. It has plenty of backbone for that reel.
I'm pretty amazed you used a LX 6/3 with it. I would think the 660XH is much more rod than what a LX 6/3 would need.
I used the lx spooled with 65 braid and 50lb mono. i was going with the supposed sweetspot (50) rating on the rod. At it was my all purpose rig.
Being that funds are short i was trying to find out if i could get by with that rod and the 4/0. I'm just getting a little gear at a time and need to buy other stuff besides another rod right now.Thanks.