I just bought a starter for my 454. The parts guy suggested it. We looked up a mid-90's 454 and he pulled the starters for them. They are very small and gear reduction, I believe. I used it on my 70's 454. The parts guy had done the same thing on his 80's smallblock after his headers were cooking the original starter. Not cheap, but what good is the whole truck if it wont start?
