J-Frame, are you diving at home, and what exposure protection are you wearing? 24 pounds seems like a very small amount of weight for someone your size diving in Alaska
The first thing I saw in your post was that you can't get your head back to see in front of you. Is this because you, personally, can't extend your neck, or is it because your gear is preventing it? If the latter, the first, simple adjustment may be to drop the tank a little bit in the cambands, and get the first stage away from the back of your head. In the alternative, it may be possible to change the orientation of the first stage just a little bit (turn the tank in the bands) to give you a little more room for your head. Getting your head up will really help with the tendency to tilt head-down.
The second thing is posture -- how do you hold yourself in the water? If you bend your knees and have your feet near your hips, you will tend to tilt head-down. However, if your legs and boots are very floaty (as can happen with thick wetsuits) putting your legs out straight may make you more feet-light. This is something to play with.
In addition, if you are in a dry suit, you may be getting too much air in your feet, which will definitely tilt you head-down.
Static balance IS important -- you can't fight physics. Right now, if you have trim weights up below your shoulders, they are worsening your tendency to tilt. You say you can't use a belt, which is not uncommon in men; a lot of people in that situation use weight harnesses like the DUI Weight & Trim, so that they can drop weight further than the waistband -- which on you, is probably too high on your body, unless you have a very large BC.
Hope these ideas are helpful.