Autex.com has many electric wiper kits and are direct replacement. Mine never worked. Plus you get motors switches and plug and play as well as intermittent. You lose a lot of airlines that leak as well as new switches that don't. Took us about an hour to pull all the old stuff and put in the new ones.
NLC-GM-EAG-002 GMC 4104, 4106 Buses can use this EAG002 model, But must be lightly modified to fit... $895.00These are the ones but need a little moding.
Certainly something to stick in my file for the future, but it seems that right now all I need to do is swap the two valves and replace a few feet of air lines. Much easier than fabricating new wiper motor mounts.The air wipers work well, have infinite variable speed, and should outlast me.
And 1979 probably could use a complete rebuild. They probably have a recommended service like other items.
Maybe so, but not right now. I talked with Luke about it, and he said that he didn't see any sign of a problem with the wiper motors themselves, just the valves. Only 47,000 miles on the bus total. I know that seals dry out, but it's not on my short list. I even asked Luke about getting a rebuild kit to have on hand just in case, and he didn't see any reason.