Lingenfelter L950075307 LSA, LS9, LS3, L92 cylinder head dowel pin locator tool v1.0 - Manual (Page 5)

Page
For LSA and LS9 Cylinder Heads
1. Using masking tape, tape off the intake ports
to ensure that no debris is able to enter the
engine.
2. Using a 2.5mm Allen key, install the supplied
10mm inner diameter set collar (57485K68)
onto the supplied end mill (PN: 8854A23).
The distance from the tip of the tool to the
bottom of the set collar should be 35.5mm
(1.4 inches). Insert the end mill assembly into
an electric drill.
3. Locate the correct mounting location in the
LSA/LS9 cylinder head, as shown in the
adjacent illustration.
4. Secure the drilling fixture to the head using
(2) M6x1x70mm socket head cap screws (PN:
47539-2) and (2) M6 washers (PN: 47393),
which are included in the kit.
4.