you need the pcm tuned for a sc engine. if you dont plan to mod it, stock pulley and and your na exhaust manifolds will work just fine.

you valve covers from the na engine will not fit the sc engine.

if you plan to mod it some, like a 3.4 pulley, you need headers, may as well install them during the engine swap.

you also need a l67 maf sensor, and its pig tail, then cut your cars off and splice it in.