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Hi Frank,
If they are all like that on one side, it is probably because a cam of more than 10.7 lift was tried. These sometimes require notching the follower towers for clearance. This job is usually done with a mill and the notches are nice and even, though it can also be done with a die grinder, or some other cutting tool, and depending on the users skill, or resolve, may be neat, or ... umm... messed up. The notches are of no concern as long as the bore does not rub the follower.
__________________
 Gordon Raymond
Illinois SNO Alfa Chapter Director
Illinois SNO Ferrari Chapter Director
and sometimes, CONFUSED AND INCORRECT, but Larry helps me out.
Now:
Illinois Chapter Director AND Charter Member of THE CONFUSED AND INCORRECT
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