[-Alero-]

yes and yes.................turbo option would be a dual turbo setup known as Bi- turbo, one small for quick spool, one large that overtakes the small for higher rpms

there are plenty of ion redlines and cobalt SS's with stock superchargers and aftermarket turbo's......."twin charged" if you will..........also i believe there is a grandprix wit hthe L67 (stock supercharged) with a big turbo


and to answer you other question yes it eliminates lag, because SC is instant, and where the SC falls on its face turbo picks up..... so it can be done all it takes is money.......and a little bit of time