HQ had terrible handling thanks to a former head of Cadillac tuning the suspension.
The 1977 HZ merely corrected this blunder to make the Kingswood handle ok.
Never liked the XB. Much prefer the extremely masculine looking XC. Caught them as cabs many a time as a kid.

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!