Yes, I made the bay 8' longer out the front. I made the length of the auto bay match the length of the equipment room + office so I only had to extend one wall. Since I brought it out the front I had to also build a new pay station enclosure.
Still have my dryers mounted outside in the back, but might do something about that this year when it gets warmer. I think I have enough room to squeeze certain dryer models into the bay.
I also ripped out all the concrete in that bay and poured a new slab with new floor heat (FYI my floor heat tubing was on the bottom of an 8" slab). It works significantly better now. Also raised the roof of the other auto bay but currently have it closed. Still trying to decide what to do with that bay.. if car counts warrant another IBA or maybe I'll do a truck bay or dog wash (my neighbor is a vet clinic, so might be a good fit).
I made the openings 10' wide by 8' tall.