Windshield wipers for a 246GT/GTS?

The windshield wipers on my 1973 246GTS park to the passenger (right) side. The passenger side wiper appears to be about 1" to 1.5" too long and sticks out beyond the windshield in the parked position. I need to know how long each wiper blade/blade holder should be and would appreciate it if some of you with Dinos about the age of my car could measure the blades/blade holders and arm lengths for both the driver's side and the passenger's side, and post the measurements here. I am not exactly sure how to properly measure the lengths because of the bend of the blades -- perhaps a tape measure rather than a straight edge? If you post, please state how you measured.

It is also possible that the blades were switched on my car from the driver's to passenger's side, and I will check that again too.

Also, suggestions on who might have the correct blades/blade holders in stock? (I will check with Dennis McCann and Rutlands too, but I thought maybe someone on FChat might know for sure).

Thank you -
Mark

 

I just measured both the passenger and driver's side blades/blade holders and they are both 18" long, and the holders are stamped "Armanac." Are they correct? Any suggestions?

Mark