As you can tell in am bored tonight with my truck on my mind...I have started 3 or 4 threads already.... I started my performance mods at the advice of Jim jr with Jdm... He really seemed to know these trucks we'll, he did not mention anything about changing the pulley... Not a good idea on these trucks ?? 2008 f150 screw, saleen package 75k miles.... Thanks in advance for your help