ORIGINAL: daveopam
I just cut the engine box corner off at a 45 and epoxied in a piece of ply to replace it.
I also had to cut a whole in the front of the firewall for the carb to stick through also. David
Falcon32 - Those above are great advice - take note of them.
It is a simple task to take out a razor saw and remove a little of the engine box.
For the hole for the carb (If you need to cut one) a 2" - 2 1/2" holesaw is a good choice for just about any rear carbed gasser. If you use a 2 inc, you wil probably need to dremel a little to clear "corners"