4 post lift in small space? Pictures?

As far as the overhead door, 10 foot door goes 10 feet into shop when its up. Be mindful.

Good call, I didn't think about this - mine is a sliding barn door. There is a way they can hang a panel door so it goes higher into the building but you're right, it might impact the ability to stack cars.

Here are a couple more pics I was looking for. The first one gives you an idea what 12' wide gives you, my door is 12' wide and it's not open all the way in this shot. The second one I can stand under it and work on the drive train, there's still about 2' of lift left to go.

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Just one more thought, if there's any way you can pull this off, I highly recommend doing so. The lift is the single best investment I made in my shop. Since the Dart is down for the count, I decided to do some quick work on the Valiant. It's on stands to get a set of helper springs in the rear, and it reminded me all over again how bad I hate doing the floor jack/jack stand thing any more. I am spoiled rotten and I know it.