Just an FYI, I emailed Ryan Kunkle of Lionel if the PRR L1 as well as the Strasburg #89 will have the swinging bell feature. This is what he replied with:
Mark,
Neither locomotives has room for the swinging bell. Also if memory serves correctly the L1 air ringer swung only the clapper and not the bell itself so I believe it would not have been correct even if it had fit.
We are still using the friction bearing style trucks on Standard O stock. While I realize the details are less accurate, these simplified trucks are a large part of keeping the costs lower on this line of cars.
Thank you,
Ryan