300 horse Dart, beautiful sounding slant!

I found this black beauty online and wondered if anyone on here knew anything about the build specs? [ame="https://www.youtube.com/watch?v=BzLqDrM96Qw"]Mopar rumble, 300 hp slant six - YouTube[/ame] If someone could give me the specs on this engine and exhaust it would be like Christmas coming early this year! Under the hood shot of this beautiful monster [ame="https://www.youtube.com/watch?v=RALrpm4SSb0"]https://www.youtube.com/watch?v=RALrpm4SSb0 :happy1: [/ame]