I don't mind upgrading for better performance. In fact, being the car is not close to numbers matching? It's an ideal candidate. But the car has a new 11" Centerforce clutch to an 18 spline A833 trans. It would be a heck of a lot easier to just build up the 440? (Stroker to a 512? Umm.) I have a set of Brodex B1/BS aluminum heads that can be ported to decent flow to accommodate a 512 build. One could get that build to easily blow past 525 HP? Plus the torque advantage. These GEN III motors produce their HP (Especially the supercharged Hellcat) at higher RPM. Well that's fine and dandy. But that takes time on the stop watch.