If you are running an MP 426 crate engine, stock as it was delivered. Single 4bbl... Where are you running your timing? MPG be damnd where does it like it best?
I've never messed with a "crate" hemi motor like yours but all the stock and SS Hemi motors on gasoline liked between 34 and 36 degrees all in, that is around 15 motors total so take that what it is worth
I've never messed with a "carte" hemi motor like yours but all the stock and SS Hemi moors on gasoline liked between 34 and 36 degrees all in, that is around 15 motors total so take that what it is worth