I just did this in my GTX. The engine would be easier to install without the trans or bellhousing. I installed the clutch and pressure plate on the engine prior to install and it was a tight fit. If I had to do it again I would install the engine only then the rest from under the car. Best way(except from underneith) to avoid damaging the paint. Keep in mind this was done in my garage with no help. My trans was a PITA to get in from under the car though.