Cam towers can be align bored since it is only necessary to remove a
bit of material from the base and a bit from the cap. Frank
Honsewetz recently had the cam towers on a U-20 align bored on a
head to use on a engine that he built for a 67 2 liter that he used to own.
It is usual to find that the cam tower bores are still alinged if the
top of the head is flat after surfacing. If a head is severely
warped it should be straightened by a competent shop before any
material is removed in order to preserve the rocker arm geometry from
front to back.
Stan
=========
At 08:37 AM 11/7/2010, Ronnie Day wrote:
>Remember that the cam tower mounting pads probably need to be trued up
>in addition to the head surface. If you don't make sure the cam tower
>bores are straight the cam can in a bind. Since the cam doesn't use
>bearing inserts the towers can't be aligned bored.
>
>The L-series heads are the same design. That's why you need to select
>your machine shop/machinists carefully. Many machine shops have no
>idea how to do the job right.
>
>FWIW,
>Ron
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