Welcome Nick The Greek to irv2.
You can get more power and better gas mileage with the Brazels Ultra power. The looong thread is down in the Workhorse forum. Its CHEEPER than the Banks sys. I had Banks on two Fords which were ok but no increase in mileage.
Planty of info in WH forum for all kinds of upgrades for your WH.
Enjoy the forums and do post often.