2nd gen wiper switch

[Dino]

Well you know me, its time to start thinking about the next mod. 

I have a 2 speed wiper motor and switch and I have a small circuit board with potentiometer that when hooked to the slow position of the stock switch will give me intermittent wipers, anywhere from 2 - 20 seconds delay.  The potentiometer has an off position and turns about 220 degrees to the max position, no way I can adapt a stock switch to do that.

The circuit board will work fine hidden under the dash or something but you know me, I want to have my cake and eat it so I would like the switch in the dash to actually work as I want it to.  I have a spare rheostat switch that I may be able to convert and use in place of the wiper switch.  It's not stock but with some work it'll look like it.

Does anyone know of another rheostat type switch I can use and maybe adapt the chrome knob to it so it looks stock?

[ODZKing]

How about a speaker fader knob? Could you make that work on the potentiometer?
Or maybe a later style like this?

I have a bunch of different style knobs in a stash from my radio days if you just need something.

[Dino]

Those would work under the dash or something.  I like this one as well if that is the route to go:

http://www.ebay.com/itm/NEW-Mopar-Wiper-Switch-Knob-1966-67-Dodge-B-Body-/161268331734?pt=Vintage_Car_Truck_Parts_Accessories&hash=item258c5774d6&vxp=mtr

But if I can have the original switch replaced or adjusted to give me the intermittent option then that's what I want.  I think a panel dimmer switch could actually work.

Good options that I need to consider though!   

[ODZKing]

A varible speed wiper switch, that is what I have on my 67.
2770378 Charger
2770379 Belvedere (same switch, longer stem)
http://www.ebay.com/sch/?_nkw=2770378&clk_rvr_id=619946235475
http://www.ebay.com/sch/?_nkw=2770379&clk_rvr_id=619949611492
Eeech, they're pricey!!!