I assume that 3 1/2" gap is with the car on it's tires, full of fuel, interior installed etc
In general what would be a good distance for a street driven car that is not drag raced? I've got "flat" leaf springs to help with handling and I wonder if the pinion snubber bushing is too close on mine. I remember the pinion snubber being a part of a metal plate that bolted to the top of the rear end, are there different height bushings?