6.2.4 client available?

The wow 6.2.4en(eu) client still available somewhere? And if i get it one, can i connect to the server with the master branch?

No, you cannot. Master branch is on latest 8.3.0 version

Yeah, but if i remove the latest content from te core, and i change the client type and version in the core, its possibile it can be run, or i have to modify too much things in the core for run? Maybe better, if i write a new core for it?

But okay, the spell system it’s different, so i have a lot of job with this project, but maybe better, then a new core… :S

Yes, google (actually, better to use duckduckgo or yandex for such things)

No, as Shauren said

‘I guess’ to the first, yes to the second. You’d have to ‘modify’ a shitload of things

If you’re hellbent on using WoD (personally, I don’t see why you would be. TC Master has all WoD content, and more, and the difference in available tools between WoD and BfA is, to my knowledge, negligible), it would make more sense to find an existing WoD core - there are some - and modify it, if you have to.