Yup, tight but doable. That's how I do my 3.2, also, have you taken your sill covers off recently?
Yes, the body repair shop that rebuilt the front of my Omega did, and reported all was fine. In the photo that is the nearside, where there is
solid, but rust covered metal. The offside is excellent in that same area. Whilst just inspecting the brakes this morning I have also double checked the sills along their entire lengths, and still all is solid with no rust at at all on any part of the chassis and surrounding areas, just that area where rust is on top of the metal as in the photo.
The bodyshop in question, whose owner/driver has an excellent CV developed in the motor industry over years and proved his worth with the front end, will soon be rebuilding the rear arches and making the whole back end like new to match the front. My car is a very late example with now just 75K on the clock and is always kept garaged and I wager still one of the best Omega's out there in terms of overall condition. I could leave it all and it would all be good for another 5 years, but I am trying to age proof this example as I want to keep it as long as possible, barring accidents etc, and investing time and money now!!
I may be mad (on Omega's), but hey ho!!