Did a few searches on the 426 but didnt find what I am looking for- First, for those who have done it, did you build it out of your 392, or buy a crate from Dodge? N/A or FI? For the N/A folks, how bad did your gas mileage go? Daily driver or relegated to weekend duty? I know it will lose mpg just trying to see if I can still daily it if I so choose. Thank you.