One of the key features of the Sprint was the Accent Stripe with Quarter Trim Delete. These stripes were available in three colors:
White [Ditzler # 8378]
Black [Ditzler # 9300]
Red [Ditzler # 71528]
It was also rumored that there was a blue accent stripe, but I haven't found evidence of one yet.
Former Sprint Registry owner, Rick Mitchell, published the following article in the Mustang Times describing the dimensions.