Frank is right. Drive it for a while and keep visiting this forum. You will decide what you want before long. I have a 51 3600 too and have decided to upgrade for comfort and safety. The low gear rear end wouldn't work for me at 70 mph on the highway. My first 51 was a 3100 and I kept it original except for 12 volt upgrade. This time I wanted a v8 with auto tranny and all disc brakes. Welcome to the bolt. Send pictures...