[Homewrecker]

Rich,
Shown below is how I mounted mine. The roll bar side has some washers that the previous owner installed that I still have to remove, but you can see the location. Drivers side is attached to the roll bar mounting bracket, and the passengers side is attached to a bracket coming off the inside of the frame rail. Quite easy actually, and everything is inside the trunk. If you have your body on you might have to search around a little for the passenger side bracket.
I wouldn't be afraid of the "Y" harness unless you are going to do some serious racing & in that case you will need to do some additions for roll cage, etc. along with a cross member behind the seats where you would mount the harnesses.