I have to open my cowl hood to get that wiper on.
Forget what year the break is, but the newer style arms have a stronger spring which keeps the blade against the glass better.
These trucks have an 18" blade spec'd. I use 19" blades. They come up just to the top of the glass/edge of the roofline.
You can grind off the tab on the post to allow the blades to sit lower, but then they don't sweep as far up.
When the ole man had cabs, instead of messing with the wiper transmission, they'd remove that tab so that they could place the wiper where it sat the best. West Coast rainforest here. Wipers get used a LOT! I change mine 3-4X a year. Neither myself nor the ole man have ever had the rest of the teeth on the post strip due to that tab being ground off.
But, in areas where there is lots of snowfall, don't know if I'd recommend that if the blades are being used to wipe off a large accumulation. IIRC, you're in Cali. Shouldn't be a prob.
You must be registered for see images attach
I used a mini angle grinder with a cone tip.
You must be registered for see images attach