So 215/60/16 is stock fitment for all 16" falcons
235/60/16 is not the same diameter as stock. The second measurement (60) is not a measurement in mm or inches like the 215 and the 16 are (respectively) but is a percentage/ratio.
I'd be mighty surprised if a 215/65/16 or 225/60/16 would foul on anything. I've been thinking of fitting one of the two to correct my slight speedo issue.
Use this handy tyre calc tool for diameter sizes.
http://www.miata.net/garage/tirecalc.html