Re: Branchline 40' Postwar AAR box cars
Schuyler--The Postwar AAR Box Car List compiled by Ed Hawkins on the Steam Era Freight Cars site only includes cars with 4/4 Improved Dreadnaught Ends, as stated at the top of the table. The Branchline PRR and Erie (1952 built) kits cited by Todd have Rib/3/4 Improved Dreadnaught Ends, and thus have prototypes not included in this list.
It should be noted that Ed's list jumps from D&RGW to GM&O, skipping at least the Erie (1946 built) cars.
Bill--The only post war boxcar tables I see on the site are the PS-1 list and the one you cited. Where did you find others?