I have suffered from similar problems over the years and I found that concentrating on rolling the ball is the only thing that helped. That means starting slow, usually doing no step and one step drills at the foul line. It also means bringing your target closer to the foul line, if not the foul line. It's easier to get your brain to co-operate this way. You can also look for Ron Clifton's videos on early hand turn and prevention. Those drills help as well.
For me, the football drill was utterly useless. I can throw an underhand football as well as just about anyone. Fast, accurate, and with a ton of revs. I also pitch multiple times a week in slow pitch. Again, no problems. It does not always translate to bowling. A bowling ball is much heavier and your fingers are in the ball. Also, your thumb might not be in the same position as with those other balls. Definitely not for me. It's why I went 2 handed for a couple of years before switching back. I actually bowled well 2 handed, but I cannot see sustaining that for long (41 now). Had my best season the year I switched back. So I'm sure that also helped me.
