The Mono Boss 429 is moulded with a "deluxe interior" option, that is a different trim pattern and additional items not on a base interior. The trim colors available for 1970 were: Black, White, Red, Vermillion (orange), Green, Tan and Blue. With Grabber Yellow exterior the non special order choices were Black or White. Other colors
could be ordered as retail order....you could get Ford to build a yellow car with a red interior but the dealer would have wanted a
big deposit so you wouldn't walk away from it!
The white interor had "accent colors" that were chosen from the other available interior colors, i.e. you would have white seats with black, blue, red, etc. carpets and dash pad. Obviously there were no white carpets. Also the deluxe inteior included wood grain dash and passenger dash inserts. deluxe interiorsd also included color keyed seat belts so don't put black ones with a red interior...the belts match the carpet accent color.
Rick