Not in a Dolomite but
Took a fair bit of cutting on the Rover seat runners to remove brackets, and to allow a bolt to be fitted through. I used a thick steel plate to bolt to runner and then to original floor mount, but it did leave the seat quite close to the door, but wasn't an issue. Depending on what model they've come out of, depends on fitting, those from a late 400 or 600 differ from the earlier 200/400 (wedge shape) and 800s, the 400/45/600 should be an easier fit as they bolt directly to the floor, I only fitted the 214 SEi seats as they were already in the shed.