I was at a swap meet in Nashville earlier this year & scored several '60-66 factory brochures. I've been in the process of documenting pics of each page so that I can share with those who may be interested. Below I'm linking to pics from a 1964 Chevy trucks 4-Wheel Drive Model brochure:
1964 Chevrolet 4-wheel drive model trucks:
https://flic.kr/s/aHsktiKSRx