'64 Dart 270 Paint

The paint you describe sounds like Royal Red Poly ("Poly" = metallic), fender tag paint code T, which for a '64 Dodge A- or B-body is Ditzler № 71355 (for a C-body 880, a slightly different deep metallic red was used for code-T, that was Dark Red Poly/71393).

See here (page 2 has the interior paints).