I'm planning on a top swap on my 05 LaCrosse and it is not supported by HPTuners. I've been searching around for standalone engine management systems for the 3800 cars and found this. 3800 Standalone Harness ? Swap Specialties

Does anyone have any experiences in running a standalone on a 3800 here in the states? I know a lot of Aussie guys do in their rwd Holdens but that's a little bit different setup.