Trying to install the electric wiper kit into a 1950 3100.

Mounting it was easy (considering you have to be a gymnast to work under the dash.

What I having trouble is adjusting the arms so that it give a fairly full swipe at the windshield.

I have loosened the allen head screws and adjusted the cross bar for the transmission arms to attach to, but don't get a full swing. 3/4 maybe is all I'm getting.

anyone have any tips or is that about it?

Thanks