I'm with Benny on this, your going to catch a lot of flack for being the od ball slow jigger. Until you catch fish! I know, I did. I still catch flack, whats that goofy thing with 4 hooks? Thats a ice fishing rod! Ya, Ya... Then I hear down the rail that Ice rods on again!.... He got that on the ICE rod?... At the end of the trip I'm standing over full cooler's, and I've got my friends calling to tell me my pictures made it up on the boats Insta/FB feed.
For those of you who are new to slow jigging, or are just I'll informed. The Rod has nothing to do with it! All the Rod doe's is work the jig. It's not for fighting the fish, thats what the reel is for. I use the Tai Chi method for larger fish. Pointing the Rod tip at the fish, keeping a slight bend in the mid section. Cupping the reel in one hand, and holding the handle in the other. Extending my arms, legs, back shoulders forward/up, then retract, reeling while on the next extension. In this method you control the fulcrum, and mechanical advantage is retained.
Also as a very experienced Japanese Jigger I know would say, " Slow jigging is to be met with a open mind, it is not only about light lines. It is a balance between depth, current, structure, and fish." In other words don't be button holed into running only 40lb, in your situation 50, 65, and even 80 may well be suitable.