John, I have a four post lift in my garage, and have a low ceiling. Give me a holler whenever you want to come by and check it out. In my case I have a low garage like yours and able to stack two firebird\camaros
Being able to store the car inside, plus a great way to be able to safely work on the car when lifted is awesome!
For the garage door, you will need to modify your tracks, what was pretty straight forward and I did myself, just a bit time consuming. What I did was cut the ends of the horizontal track (the track the door goes when it is fully open), and add that to the vertical. You will need to remove your current motor and track (takes 15 minutes) and go with a side mount motor - I used a Liftmaster, and itrocks, coms with sensors, plus ads an internal lock to the garage, motion sensor light, etc.
I was quoted a small fortune on doing the garage door and track swap, so did it on my own, not the prettiest but works perfectly. There are a couple companis that actually will sell the new track setup for you (wish I had done that to start with), what will make life easier.
Sorry only have this crappy phone pic handy.
There is a lot of space, and in my case in order to store two cars, my top car (i.e. bird por camaro) has to be parked facing forward. The door will open very close to the ceiling, and has plenty of space to clar the hood and windshield. My lift is as close as possible to the door. If you put your lift all the way to the back of your garage will be even easier. BTW most ligt come with removable dollies and moving thema around the garage whenever you need is a one person job, very sweet! as far as bolting to the ground, as we live in Quake country all of the sources I inquired mentioned it is better to have the lift unbolted to allow for some wiggle room. Once a car is on top that thing does not move
I wanted everything as safe as possible in teh acse i.e. my little ones wonder in teh garage etc.
I did a LOT of research, and the best 4 and safest 4 post lift for the money in my opinion is the DirectLift setup. I have a great local connection if you want, and he has a warehouse in Hayward, has excellent customer ervice and he displays at the Good Guys (I met him at the Pleasanton Good Guys). He even a person available for delivery and setup if you want to. I put mine together myself, and help from my buddy as the track with the RAM weighs a lot (yes you can do it with a dolly or Cherry picker); it is a full 8 hour day project but worth it if you want to learn the ins and outs of the setup. A lt of peopl reocmend Backyard Buddy lift, but I compared both and teh Direct Lift has a best fail prooof mechanism (secondary locks, tension locks - i.e. your cable brakes, lock actuates, etc).
You know where I live, so feel free to give me a holler if you want to come by. Warning, my garage is currently an EPIC mess!
Gui