I am pondering building a new generation N/A Hemi based on the new Mopar Performance aluminum block and 6.4 heads. Does anyone know any of the pitfalls of this build and the shortcomings of this engine? I am just now starting to do research on it and the heads look like they will flow a ton of air. Would probably build about 4.185 bore X 4.125 stroke, 14:1 compression or so. Would like to see 850-900 hp. Does anyone see why this can't be done?