how to tell if 70 Dart is real 340

Thanks for the tips. I need to check the rad support. Did the 6 cylendar cars come with disk brakes and the same dash? Thanks!

Some did if ordered,I got the paperwork with my car and the guy ordered the brakes and sway bar. My 70 has front factory kelsey hayes 4 pistons discs and a factory sway with the original slant 6