It is a little hard reading your post due to no capital letters, and odd placement of "."s, and long sentences. I think this is some help in IDing your 265 which is a 235.
C216743F55S
C = ? (might that be a number/digit?)
216743 = (should be seven digits) = 215743 out of that plant that model year
F = Flint, MI plant
55 = 1955 first-series truck
S = 235 engine in a 4000 series truck
http://www.1954advance-design.com/chev-specs/1955-1st-Chevrolet-t-ser.pdfCON 3 = Conveyor #3
L214
L = 12 = December
21 = 21st
4 = 1954
(an end of the year block)
C12 = Conveyor #12
A35
A = 1 = January
3 = 3rd
5 = 1955
What does this mean:
. . . there is a big difference in cam and oil flow even water pump . . . 
