I ran into the problem in '07. Took me awhile to find my log entry addressing the problem after Woogeroo PM'd me regarding your problem. Here's the pertinent excerpt from my log entry.

Quote
In the previous log entry I posted on monday, I documented that the eleven inch windshield wiper blades for BillyBob were too long and getting caught under the gasket at the top of the windshield. I jerry-rigged the wiper blades by cutting 1/4" off the offending ends and crimping the other ends so that they would not fall apart as a temporary solution. One of BillyBob's fans at American Classic Truck Parts read the log entry and sent a pair of ten inch blades that fit perfectly! For those of you '54 - '55 1st Series Chevy and GMC truck owners who have run into the same problem of the eleven inch blades being too long, the American Classic Truck part number is "WW129" and the description is "47-53 WIPER BLADE TRICO MODERN NORMAL LENGTH 10 INCHES".


Larry Kephart
1937 Chevy Utility Express (Deerslayer)
1955 1st 3100 Chevy (BillyBob)
2017 Cadillac ATS-V (Elvira)
Boca Raton, Florida
e-mail: [email protected]

http://www.laroke.com/larryk4674/1998/billybob.htm