That was a busy week, the owner of that Lumina was really tired of feeding that V8 on petrol. Fuel efficiency increased with the 2.7L J2 replacing the 6.0L Chevy V8. If it couldn't keep 9kmpl on road traffic, now it does 12kmpl in city and around 14 on road. It was positively possible to keep the stock gauges and passive theft deterrent by converting mechanical input signal from the alternator pulley into electronic signal with emulators attached to the stock ECM so all the electronics work as they were supposed to do. Just the anti-lock brakes required some major work to get rid of the vacuum boost.