I recently bought my frist ford ever, its a 95 super dually 7.3 turbo diesel 5spd. I was woundering if its worth the time and energy to do all the simple trick mods. EOT mod, IPS mod, IDM mod, and shimming the FPR. I have guages on the way in and a 3in down pipe and a 4in cat back exhuast coming too. I 've done the k&n intake with the 6637 filter. So should i do all the simple mods with my intake and exhuast or get a tunner?