2014 cm2350 how to get engine brake back after vgt delete

[FUDGENWORTHIT]

The turbos already done. Sold the old so just want to know if there’s a way to make it a little better. It makes 43 pounds of boost and sitting at 750/2350 currently. I gained over a mpg with the sway and average 6.8 mpg so I don’t think it was a mistake and I was down in the mid 5s. I meant {big-name trash tuning} cam. But I would think a 570 cam would be the same?