The correct engine for your truck is the 206 (as stated above) and is a one year block and head. The engine is the exact same as used in the cars with the exception of having different bolt on items.
The block you are looking for is cast number 836010 and the Head is cast number 837981.
The 1936 motor is a carry over from the 1935 motor and the last year for the 206. Most of the internal engine parts are shared between the 35's and 36's with the exception of the Oil Pump, Water Pump and Distributer.
Hope this helps,
Mike B
