That would be a 195" wheelbase. There were only two lengths offered by Chevrolet from '41 to early '47 for School buses. Mine is the shorty at 160" and a couple of larger models were built on the 195-1/8" frame.
Weight and wheelbase would dictate the trailer size. Not sure on the weight but it may be on a placard on the bus somewhere. Actual weight is probably less than 10K, but that's just my guess. The total curb weight of the complete 195" rolling chassis, running gear and Chevy cowl was only 4515 pounds (mine was only 3790).
GO FOR IT!!!