Cause and effect.  Something is causing your swing to get that far behind your head.  That needs to be corrected.  If you do not correct that first any drills will cause more problems.

You can do one step and foul line drills without muscle, you just can't try to throw the ball at full speed.

Or since not everyone can adapt to the 'modern' game and may be contemporary if you open your shoulders & hip allowing the ball to swing through instead of around...

Start closer to your finished position ie your right shoulder & hip are open so start with your right foot open to the lane easing opening your hip; have shoulder mimic hip

It is not bad to want to emulate the stars of the game but reality is what you are capable of accomplishing...they are stars for a reason

This will be covered in our next release on the approach and we will approach it targeting the average bowler...not the elite (:

If you do not properly set up, placing the ball inside your body merely creates more wrap around or to swing around your body instead your body working around your swing...that's why it's called timing

I'm not discounting what Norm may or may not have suggested...I'm discounting making a blanket suggestion not understanding the whole picture....if the set up is not correct, making an adjustment such as this can compound it

I had that problem a long time ago (wrapping the ball behind my back). I was (and still) am, an old time stroker--- minimal forward and side tilts, square shoulders, no crossover step, pushaway directly in line with shoulder, posted release. In my case,
the cause was due to my rotating my bowling hand (right hand) counterclockwise on the backswing. This shifted the ball's weight slightly inward, causing my swing to
"tug" behind my head. Fortunately, on the downswing I would rotate my hand counterclockwise again, but this was causing way too much movement in the swing.
Stabilizing my hand from stance to just before release, eventually corrected the problem.

I agree with the suggestions from the various posters. The thing to remember is that
there can be many different reasons why your armswing is not straight. How you set up in your stance is critical, as JustRico pointed out. There is a lot of truth in the statement that, "if you do not start right, it's hard to finish right".  The direction of
your steps, as well as the position of your bowling shoulder from start to finish play
key roles in determining the path of your armswing.

Basically, I found that your ball alignment in the stance, and in your pushaway  should follow in the same direction as your key (pushaway) step. If you deploy a crossover step, then your pushaway should follow in the direction of that step. If you
do not cross over as I don't, then the ball should be aligned and pushed in the direction of your bowling shoulder. Classic strokers such as John Handegard and Mike Durbin are good examples of the latter.  Once your body is in motion, it is important that your bowling shoulder remains "silent" --that is, there should be no excessive
movement of the bowling shoulder . Pre-setting the shoulder in your stance and maintaining it throughout the approach will help your to maintain a more consistent
swing plane shot after shot.

Good luck!