308 engine identification

Can someone please help me identify the difference between a 308 engine manufactured in 1952 and 1955? I have a 55 308 engine that was purchased from J C Whitney., it was painted blue. My cast numbers are 5325000, CWC 2. these are in 3 rows. Any extra info will be grateful,

Thanks Wookie


  • 54coupe54coupe Posts: 793Member
    The 5325000 is the casting number for 55-56 engines.
  • blondwookieblondwookie Posts: 239Member
    What I need to know, about the difference in the engines is in the material used to manufacture the engines. I have been told there is a difference in the material used in the construction of the 53 308 and the 55 308.
  • GeoffGeoff Posts: 4,322Senior Contributor
    Possibly aprocyphal, but the Kenosha 308's were ostensibly not as hard as the Detroit ones.  However, the  1953-54 Mechanical Procedures supplement book says that chrome rings are to be used in 308 and 202 motors, which previously was no-no, as these would not bed in with chrome-nickel blocks.  Does anyone have specific data?
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