I happened upon a handful of LM308 recently too. Not metal can but late production DIP-package by STMicroelectronics. Recorded some DIs and used a reamp box for a proper comparison between the LM308N and the OP07 in the exact same pedal. I'm usually not one for mojo parts but these really do sound different. Not that the OP07 sounds bad or doesn't do the rat thing, the LM308 just has a different tone and I do prefer it.Just replaced the OP07 in my Rat with a metal can LM308 that @Barry generously sent to me.
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