Hi,
From the description, what you have is NOT a data book but the Chrysler Engineering Department's informational file item on the 1951 Frazer (I have a copy of the thing). Photos were taken at the K-F dealership Chrysler had some involvement in (look at pictures in the 1953 Kaiser file' they're taken in the dealer's showroom!). The thing was put together to give sales & marketing and other departments access to information for car comparisons as you noted. I have copies of 1949 Kaiser & Frazer, 1951 Kaiser, Frazer and Henry J automobiles, 1952 Kaiser and HJ, 1953 Kaiser & HJ and 1954 Kaiser. I also have 1953, 1954 and 1955 Willys Passenger Sedan/Hardtop items. Missing is the 1947 Kaiser (and perhaps 1947 Frazer as separate items) and 1947 Frazer information and I think that's the set but can't be sure. As far as I know Chrysler fell back on HJ reports with regard to the Allstate