Brian, not sure what it was out of, I got it with some other 65 parts years ago. I thought there was a difference but do not know what. I did some measurements on it and my GS and looks like the lower support is the difference. Other than that the top and sides look the same. Years ago I used a 65 Skylark to repair a GS but think I used the drivers side off the skylark on the GS, for rust below the battery on the drivers side of the GS.
Thanks for the info and I do think this is a Skylark. Do you know if the Skylark with a crossflow used the same bottom piece as the GS or one like I have?
It the only difference is the bottom support and put the GS one on off a rusted or damaged one.
Do you know if a 66 Skylark or GS lower support is the same as a 65?
Thanks Bill.