I doubt he wants to get into that garbage of swapping a different motor and having to get a tune and having to buy extra parts and do extra things to make it work.
To answer your question, the L32 is still a series 2 block (they all are), just the piston/rods are made different among a few other very minor changes.
So either look for a L32 or find a L67 from the previous gen (97-03). Remember they came in park ave, bonnevilles, regals and monte carlo's too. That way all you have to do is swap your intake manifold and supercharger over with a few gaskets and you are good to go.
L32's are in 04-05 GTP's and 06-07 GT's. 2008 dropped the supercharged engine.