they measure 6 inches across,and 23 inches long from bottom to outlet.
If it's a ChevyII,and the heater & defroster ducts are out,it would probably fit,it has crossed my mind too.
Being sneaky are we??...LMAO!
Mark
410-588-6230
BENCHSEATRACIN@comcast.netwww.BENCHSEATRACIN.com