My Opinion , on this is,Funny how it was a Feels so much better answer, than a it picked up X amount of hp, and no Cost was givin per power gain , a DUI is Mid 70's Tech , Which of course is Way better than the ( slightly above a Farmall H Ignition ) "Tractor",that a loadamatic is , show me a Ford with a loadamatic and at least 75% only have base timing ( the advance dosen't work ) a Durspark and a GM Module or better yet a MSD 6 ( or equivilent ) along with any modern coil will be cheaper and look better than a GM DUI , again as I stated in some older posts if it was THE TICKET , Nascar would use it , they Don't , To be fair most articles are written after the part was donated to whoever was doing the writing ( or at least employed by the recipient ) so take it for what its worth , an advertisement