I believe the FRA outlawed footboards as of Jan. 1, 1981. As I recall, footboards disappeared across the board prior to that date. However, most railroads would not have removed them without being nudged along by the authorities. In any case, I believe steam locomotives are exempted from that particular requirement.
As concerns pilots, there is no definition of what a pilot is. It can be a traditional "cowcatcher" or a simple flat steel plate. Steel mill railroads under federal jurisdiction often requested and received waivers on the pilot rule since they ran on incredibly crappy track and often derailed. If the type of pilot on No. 3 is a concern, a request for a waiver based on the historic appearance of the engine may be the solution. It certainly wouldn't hurt to ask.
"Deadman" equipment is required if a locomotive is to be operated at speeds in excess of 20 mph, but again, the language has wiggle room. Such a device must be operational if the locomotive is so equipped, but if the device is absent, it's okay as long as the speed restriction is observed. On several shortlines for which i worked, the deadman was removed on locomotives purchased second (or third) hand from Class 1 railroads.