I'm puting a new engine in my 89 Trans-am and would like to replace all the 17 year old wireing. It would be nice to go down to the dealership and buy a complete harness and replace it but that doesn't seem posable. Has anyone had any luck with useing the pianless harness? its not made to replace the stock harness so can you plug it into the computer and work it into the harness and have every thnig else work ok? any other ideas?