hi guys i was wondering could anyone help me with a few questions i have about this swap. i already have the engine, im currently rebuilding it. my dilemma is my aunt has a 03 bonniville who's 3800 is knocking like a jehova's witness and she wants to trade engine's (3800 to 3100) out of my car for her tranny which would be nice, i.e FREE parts!!!! any suggestions or info would be greatly apreciated.