Looking at my wiper arms they are the same size but the blades are different, I have one that is 10.5 inches long and one that is 9.5 inches long.
Are the arms the same for both sides and what is the correct length of blade?
I have this style of hooked wiper arm.

 

They're the same and the blades are 10". Jeep CJ-5/7 blades are generally a match, depends on the arms you have. O'Reilly's #'s:
Arm: TRI 51-062 Blade: TRI 33-101

 

Thanks, my arms are similar, but have a bend in them at the end so they are flat with the bottom of the windshield in the park position. The Jeep ones look to be completely straight?

 

They are adjustable, both length and angle at the blade end. Check them at the store, but that's how mine are. My old ones had the angle in the arm, too.

 

What other arms will fit the 55 f-100 motor spline? Mine got caught while the hood was up and bent but I can still use it but would like a new one that is a little stronger looking. Preferably not made in china. Are all splines created equal ?