Norton is correct, and if you want the passenger pilot, its the only way to go. Fixing the stock pilot is also an option, and @Laidoffsick did this on his ATSF F3s, all documented here: Lowering Lionel F3s.
I've also started doing this on the F7s, and did some work on a B unit; Lowering Lionel F7s.
Thanks.
- Mario