if you can get the seller to give you measurements i woul dask for them and compare to yours,,
do you know who the maker of the gasket is ?? 2 companies making them,,,one companu name is some thing like perfect or persission,,,i cant remember,,,they seem to have the windshield gaskets that fit...
in 1979 i bought a replacement wind shield gasket from chrysler for my 1966 baracuda,,all tho it has been in 2 cars it never fit correctly,,,
i recently bought one from laysons the same one some e bay vendors sell,,i compared it to the orignal,,i measured th are of the new gasket where the mopar replacemnt was in correct,,it compare perfectly to the orignal gasket i stil have,,,
i have been told you can soak the old gasket and revive it,,but cant remember in what,,,i thought they said formula 409 but if i were you ide call a loacl glass shop that deals in vintage cars and ask them,,