However, I will add this tidbit.
If you plan on using Stage 2 heads.... my memory tells me there's no drilled and tapped bolt holes for the drivers side accessory bracket to bolt to, nor on the passengers side where turbo heat shield bracket would bolt to. I'm also not sure if there's enough meat in the S2 casting to drill and tap them without hitting the coolant passages in the head. All of the standard style heads, GN1, TA Performance, have these holes drilled and tapped.
Patrick