216 in nothing larger than a 4100, or 4400. If it's a 6100, 6400, or 6500. It would be a 235 up until 1953. 6700 series School bus chassis, & all of the "5000" series COE's would have had a 235, up until 1953.
Spanky Hardy Collector Of Fine Old G.M. COE Trucks & Antique Holmes Wreckers