How much time to add for a double recipe of meatloaf?

[Hink]

“Not Your Mama’s Meatloaf” is a huge hit with my family — so much so that I am bbq’ ing a double recipe for Super Bowl. Q: for a double recipe, how much time do I add? Thx

 

[BA_Ga]

If it were me, I'd simply divide it into two loaves. That way, it would be the same cook time.