I doubt it - to my understanding, no matter what you do with the sense pins or whatever, in stock form the analog board is only capable of running at 512x384.
Technically that's 560x384 (in Apple IIe mode). But this will rock your understanding somewhat: Though I have never been able to get anyone to explain it, My Macintosh TV logic board will drive the Color Classic at 648x480, without any special extensions, software or hardware hacks with any supported OS. Suspect this is true of all Mac TV boards. Anybody wanna take a crack at explaining that in 2010?
I'd just remove the Colour Classic analog board and use one from an LC575
Except that is a MAJOR hack, requiring significant modification surgery not for the faint of heart.
