Hy Squire, the 322 was available in conventional trucks, low cab forwards, and the school bus chassis. In the LCFs it was available begining with the 9100 series, and larger trucks, in the conventional trucks it was available begining in the 10100 series, and larger trucks, in the school bus chassis it was only available in the 10802 series, in the tandems it was available begining in the 10400 series, and larger trucks. The 322 was only available in 1956 and 57 in all but the school bus chassis, where it was available from 1957 to 59, hope that helps.
