Front door glass/window whisker sweeps

Recently installed door glass sweeps in ‘71 Duster. The passenger side glass seems to roll up and down “okay”. The driver side takes two men & a boy to operate. Okay maybe a little over exaggerated. Is there a secret in getting these to fit as when they came from the factory. I never remember them in the day being so stiff to operate. The sweeps were purchased through Classic Industries and I was told they are made using the original specs.
Thanks for your feedback and insight!

window adjustment ----------