Classic/Antique Car Repair: 1940 plymouth, hemmings motor news, plymouth engine

Question
I have a 1940 plymouth road king.  I want to keep it original, but I cant find a radiator or any other parts for the engine either.  I was also wondering if a 1939 radiator would fit in the place of the original one.  One more thing, will a ford flat head from 1940 fit, and mount up to the sock 1940 Plymouth engine mounts.

Answer
My stock answer for “where can I find….” Is to latch on to a copy of Hemmings Motor News, the old car hobbies classified bible. There are many companies that supply parts for old cars and you will find them in Hemmings. www.hemmings.com. As far as dropping in the Ford engine, you are in for major modifications.
Brad