All 1970 Challengers with cloth or leather interiors also got the carpeted lower door panels & rear seat ashtrays as part of the H5 & HR interiors.
So far, Banana T/As are the second most common color, purple being the most common.
I just counted the Banana T/As that I am aware of so far for you, 61 have painted tops to match the body, 50 have black vinyl tops & 1 has a white vinyl top.
Please keep in mind that there are still about one half of all T/As produced that I have no option codes for yet, so these numbers may go up at any time.
I have heard of only two Banana T/As with the black leather interiors so far, is your dad's name Brian by chance?