Is the rear quarter panel the same between 64 -65 Cutlass 2 doors? I want to try and replace the rust section as seen in the picture on both sides just past the rear wheel. Is there any aftermarket part for this ( probably dreaming) and just maybe is there a sibling-Skylark-Lemans-Chevelle that may work? QTR.jpg

 

No aftermarket stuff and there probably never will be...I had rust in the same location.. I had a beat up front fender and I cut out a patch panel using the flare from the fender. It took a while because I had never done something like this before but the flare from the fender matched up the to quarter flare and it worked great...

Im pretty sure 64 and 65 1/4s were the same for patch purposes...

 

Thats a good idea I have an extra left front fender.

 

Just be real patient and it should work great...took me several hours to make a graft..lots of trial fittings.