I have a 1990 w250 getrag 5spd. I my goal with the truck is 450-500hp. So far with the truck is 4in turbo back exhaust, grinded down the fuel pin, fuel screw has about 6 turns in, and a BHAF i do have gauges. It is my DD, i do alot of towing trailers 4,000 to 12,000 lbs in the mountains and on...