I have 1990 cabover with a 13speed and 4.11 rearend, it has a 4mg 3406b with 167,000. Screws turned out 2rounds and afc adjusting. Going to hang a bw turbo and turn screws out more. So the ? Is on all the forums that a read to put a177148 on it, that helps low and midrange, but others say it runs out up top and that’s my concern being that my truck only goes 65 at 1800. Would it still be the right turbo??