1963 wiper arms

[Bob R.]

I have polished wiper arms on my 63, however one of the arms has 2 rivits on the top surface and the other has only 1 rivit on the top surface. Is one of the arms incorrect and if so what is it for? I checked the AIM and found part numbers for the arms but could not find part numbers on the actual arms.
Thanks for the help,
Bob R

[Timothy B.]

Re: 1963 wiper arms

Bob

I just checked mine and they have one rivet and there is a screw on the side to adjust wiper angle.

[Jack H.]

Add-on

Corvette was unique with the Trico arms having the side mounted adjusting screw, Tim mentions. This allowed the upper arm rod to 'swivel' relative to the arm's base using the SINGLE attaching rivet as a pivot point.

Standard passenger car Trico arms from that era did NOT have the wiper blade 'cant' adjustment feature (screw on the upper side of the arm's base) and since they were fixed in their geometry, they used TWO rivets to attach the upper arm rod to the arm's base....

My hunch is one of your arms is a generic replacement and lacks the side adjusting screw on the base of the arm. Expect a 20-40% originality deduction for that arm as it doesn't have the same Configuration (lacks the side adjusting screw and has an extra rivet) as the correct factory original and it didn't Install the same way (no adjustment to center the blade).