Just a thought, does anyone make underdrive pulleys for the 5.7 hemi? I know all of us with the "non-tuner capable" trucks look for every tiny way to tweak more power, and this thought crossed my mind. Remembered it from my 5.0 mustang days, lol....
unless something popped up recently then that's still correct but I'm not even sure the ATI will fit because they just list a "5.7 HEMI truck length". There is no distinction between 3rd gen and 4th gen. I know from holding both model pulleys that they are different.