Savage Worlds Adventure Edition (SWAdE) is the latest version. If you're new to SW, I'd honestly stick to Rules As Written (RAW) until you get the hang of the game system and it's complexities.
To be honest, sometimes things you look at and think are minor changes could have HUGE impacts to your game, and could leave you with a bad taste in your mouth for the system itself, even if the system isn't at fault.
That being said, there's a ton of free resources out there for SW from a number of people. There's a Facebook group for SW (
https://www.facebook.com/group...fficialSavageWorlds/ - I know it says Unofficial, but not too long ago it was changed to the actual official one by Pinnacle (PEG) themselves) which you can pop questions to and get answers from a host of veteran players, as well as the creators from PEG themselves, as well as a host of Aces (companies officially given licences to make SW game material).
You don't even really need Deadlands to do it if you just want to get rid of the "Weird West" vibes. The core book can handle it pretty well with you providing the flavor.
Good luck with your game!
-Jeff, Atomic Ninja Studios