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Looking at replacing a damage head on my '71 CL. Are there any interchangeability issues from year to year on the 450 top ends? IE would a '74 CB450 head fit my '71 CL450 engine?
 

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All the 5-speeds are the same head.
Though some are aluminum-dome, while others are cast iron domes. There seems to be no clear division of K-models for this, it appears across the board.
Easy to check with a magnet.
 
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