Here are some more pics.
Notice how the short tube seats in the counter bore
just short of the steel liner.
You can use a high quality 1.5 inch hole cutter
instead of this shell mill to rough it out before
final boring.
--  Paul Lamar ...No rotor no motor.

This part has people scared but there is nothing to it.  It has been
awhile but I think I drilled a 1.25 i.d. pilot hole and then opened
up with a boring head.
.  It does not take long.  One practice hole and you will have
confidence to do the real thing.     Jerry


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