How/why did you decide to move it? Did you dyno the truck to get the HP number?
When I built exhaust, I wasn't thinking to much about location..afterwards..I felt that my 4runner was running rich..I thought what the heck. I'm going to move it as close to exhaust manifold. As far as knowing HOW I know mileage has improved..is i have scan gauge permanently mounted where altimeter used to be.. I dont drive on hwy much..but I went from 13 mph avg to 16.8...