Flywheel/flexplate identification?

[HotWheelsBurban]

I was traded this flexplate for a 454 one I had, at the swap meet this past weekend. Guy said it was for a later 90s (Vortec) 350 but I'm wondering if it's actually for an LS platform.
Any ideas, and what is it worth in brand new condition? Thanks!

 

[movietvet]

All those numbers in the first pic should help you find out what it is for. Looks like there is a 7 digit number stamped in it and could be a GM number. Search at RA with that number. Google all the different numbers, too.

 

[RDF1]

It looks like a 4l60 LS flexplate. Whats that part number on it?