Cindy, I switched my vacuum lights over to electric motors . I can't recall the name of the company that made them but the cost was around 825 - 850. if you can't fine them let me know and I'll pull my files.
It was a good decision. It convinced me to wipe out the entire vacuum system. Yes, wipers included. I have no vacuum functioning on the car at all. I completely removed everything related to the wipers. Who's using them in a car that NEVER sees rain? Unless you live in Washington State, lose 'em.
I was looking for a clean firewall and to eliminate that ugly basket of bolts, wires and other mischaegotz that found a home in the wiper bay.
My headlights go up and down consistently, don't slump and when you look through the hood and the grill it's all nice and clean. There's nothing there. No vacuum hoses laying around and they work wonderfully. The install was really very easy. There was a bit of time spent getting the actuators in the best spot. But nothing crazy.
I have also heard that you can adapt a set of actuators from the late '80's to the early '90's.
Check out this article in Super Chevy.
You'll find it helpful.
If you wind up ditching your wipers take a look at our site
www.powerportalproducts.com for our windshield wiper bay cover. It was designed exactly for the purpose of making that ugly wiper bay "PIGPIT" go away. It's removable too.
I think you'll really like the electric after all the vacuum goes away. Good Luck!