Gentlemen;
For the benifit of future readers; In 'late' 1954 (55 model yr) when the change took place (water pump) there were 3 kinds. This is the reason for confusion on this issue.
The 6 cylinder trucks had Two types & V-8 version was the Third.
In the 'parts books' this is listed as the "first edition" (54) and "second eition" 1955.
Therefore; 1955 (second edition) is the same through 1962 on the 235/261 engines.
