Ahh I thought it was on an angle. Guess that's not as bad then.
There is plenty of room to dremmel there though. Also if you have a look at the DIYs for pre-facelift coupes they say to shave the top of the FX-R off. I reckon with a touch more modding you could get it to be 100%
Also. Wouldn't recommend glue. Use some high temp epoxy. You'll only melt glue over time.