First time pulling, what gear with 48re?

[Foster#17]

Hi everyone, this is going to be my first time pulling and I'm not sure what gear I should be using? It's a built 48re and I have everything in my signature and I don't have proof yet but the truck should be making somewhere around 1000hp. I saw a lot of guys said to use 2nd gear 4hi but I feel like that won't be enough speed to get the sled moving so I was guessing third would be a better pick. Any advice would be awesome, Thanks!

 

[nasty 2005]

Drive in low range locked up.