Cool truck. That 302 must have been installed later. Being a 350 series, 2 ton, a 248 was standard, and a 270 was optional. The 302 was standard in the larger 3 ton 450 series, and 3 1/2 ton 470 series trucks
Spanky Hardy Collector Of Fine Old G.M. COE Trucks & Antique Holmes Wreckers