Can i play a minecraft speedrun with resourcepack (Faithful classic) and a mod showing a timer?

Hello,

The rules say: "If the resource pack or mod does not grant any advantage to the player and/or doesn't change the game considerably, it may be accepted if the moderator verifying the run finds it acceptable, but because it's a subjective matter, it is greatly encouraged to not use any."

So the answer is it might be allowed if it does not give you a significant advantage and/or change the game considerably, but it is probably better if you use none. For the timer, you should be allowed to use the ones found under "Resources."

I hope this answers your question.