[elhigh]

According to one owner's claims that I found, about 18mpg was typical. That was with the thrifty straight six 230ci engine, the lossy two-speed Powerglide, and low-buck high-strength taxi equipment, so figure the middle rearend, somewhere along the lines of 3.55 or 3.73:1. The Chevelle was available with a 3.31 all the way up to a 4.88 LSD, but you can figure that only went into the cars headed for the dragstrips.