I doubt it, there's a significant flat GRP plate between the upper and lower dash sections. You don't have to remove the driver's side dash top bolt to do this. Removing the two bolts on the passenger side will allow sufficient access to the back of the oil pressure gauge
I was able to undo most as suggested to get this gauge out by flexing the dash and reaching in behind to spin off the retaining nuts.. However Im not sure how easy it will be to re fit without loosening the final bolt which according to most of my searches is a bh...