I'm thinking about speedrunning Mario Kart 64 and i'm just wondering if it's okay to use the emulator called "Project 64". :)

Yes. That is the only one that is allowed. But you have to use version 1.6.

Great. Do you have a download link for version 1.6 or do you know where to get it?

It should be listed under the downloads section of the Project64 Website.

I don't know if i'm just dumb but i cannot find it... :I

Edit: Nevermind, I found it on their discord. Thank you very much 3Tau! :)