The engine bay does look nice. All the eco's got the same trans in the n-bodies with the exception of the 5sp's. 2.2's in sunfires, cobolts, cavaliers, G5s, had some different stuff going on but is all compatible.
What, if anything, did you use for a gasket on the 4-2-1 headers? They have a bad history of leakage so you should keep us up to date on that.
