With the wiper arm located, the wiper transmission was mounted next. The Outlaw Willys body has a wood frame running around the interior portion of the windshield opening, and this would be a good place to mount the transmission.First photo shows 3/8" hole drilled straight through frame and body. I decided to inlet the wiper transmission into the wood frame so that it would be flush with face of the frame for a few reasons. First, the wood was thick enough to do without weakening it, the transmission would be better supported, and most importantly, there would be no bulge sticking out of the finished headliner.
Second photo shows the frame carved out after a few minutes work with a router.
The last photo shows the transmission installed flush with the wood frame.