Have you looked at New Port Engineering? I have read some good things about them. They were outside the budget when I was putting my Burban together.
I will say that cleaning and lubricating the factory linkages (Especially the firewall seal) on my Burban made a huge improvement in the wiper speed. I added a Revolution Electronics delay module and for the last 40k plus miles I've been happy with the setup.
Link to my repair thread. See post 127.
http://67-72chevytrucks.com/vboard/s...=698377&page=6
Just for reference I live in Portland OR and the Burban is my year round daily driver.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.
RIP Bob Parks.
1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread
http://67-72chevytrucks.com/vboard/s...d.php?t=698377