sctcrash... I'm not sure what mount comes with the UCD, I got
my plane used and it already had a Hyde soft mount/YS 63..
If it comes with a adjustable GP mount, you may be able to
spread it far enough to fit the bigger engine but I'm not sure..
If not you have to redrill... It's not too hard but it is a small
space to work in more so if your hand are big....
You could always do as I did and pancake it in after running
out of fuel and ripping the gear section out... It gives you a
bit more access to the area