Ideal AFR for 5.7 hemis ,NA

Hello Guys I?m looking for your usual support

I have a ram 5.7 Hemi complete bolt-on

I use the truck mostly off-road conditions through the dunes ( where the truck at high rpm, while truck speed is low).

At WOT the afr between 12.2 then it goes richer till 11.8 at 6000 are these numbers ok ?

little on the rich side I like seeing 12-12.5 WOT

I target 12.5 on the trucks, 12.5-12.7 on the cars

.85 lambda

Many thanks