Have these sleeves been modified (61x)

20150827_175147.jpg In the 61x cylinder, do all sleeves hang down on the top of the exhaust port? the sleeve and casting are flush in this one.

And how much of a difference in bottom end is there, if this one has been modified.

20150827_174602.jpg
 
Location
usa
their all like that on 61x cylinders
i call that no variance between cylinder to cylinder
all have this mis matchup
 
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