Building a mild 440
The 906s I had were 91cc so you would have to find a piston to get 10.1 and probably zero deck. Even at 9.1 in a Dart it would be fast. The 446 that was in my car whenever I bought was about 9.1 2266F pistons .074 in the hole 906 heads steel shim gaskets ,TeamG, 509 cam,3800 convertor and 391 in a 68 FB barracuda went 11.91 @ 111. With an SD or a Performer RPM or TM7 it would have probably been quicker.