It is a direct replacement for the trucks when you use the wring that comes with it!! It will definitely power whatever you have especially while in motion!!! This thing had my truck volt meter waay over the 14v mark!!! I had to take it out though because i got an Under drive pulley on my 6.3. At idle that really hurt its performance, but around 1200 rpm this thing kicks in hard!!! And that was with the UD pulley, probably would be around 800 rpm for you