Hey Jon, In order to switch to 2 speed, you'll need the wiper motor as well as the switch. pretty commonly found in wrecker yards. I was going to go that route, but decided to just install a wiper delay switch tucked under the dash.
[IMG]
http://i284.photobucket.com/albums/ll8/drackett19/IMG_1181.jpg[/IMG]
You can get new ones from JC whitney, i bought this one off ebay for $20, NOS part from the seventies I think.
Easy to install and you can have whatever delay time you want.
Edit: By the way, sweet stepper you've got. Are those the original 15" wheels? what size tires are you running?
