I grew up with station wagons ... which Rob’s wagon has. Per the 1978 Buick brochure, the Estate Wagon Limited included “… 55/45 notchback seats, power windows, a custom tilt steering ...

Still, two wagon-ish filings with the USPTO from Buick in under a year makes it seem like there's at least someone at the Trishield brand that's campaigning for a long-roof Regal. Fight the good ...