The Wild Wild West TV series is being repeated on the CBS Action channel in the UK. Now I never saw this at all growing up (3 TV channels until the start of the 1980s then a fourth and fifth followed by the satellite ones), so I had no reference at all for it until the Will Smith and Kevin Kline disaster of a film.
The TV series on the other hand is really quite a joy and perfect for Pulp. Granted there are no aircraft but you have virtually everything else and it strikes me as a goldmine for taking ideas. Dr Loveless is a great recurring villain and his escapes fit the mood.
One of the episodes just aired had a prototype tank, forty years before they were first employed.
There are also a variety of death traps for the heroes to evade which are just as relevant to the 1870s steampunk as they can be to the 20s and 30s.
The writers also made certain that a seeming disability such as blindness did not deter people from being effective villains.
So I would encourage people to look it up and pillage it for ideas.