A springover is a good idea if you plan on anything more than a 38" tire. 38's will rub slightly at full stuff.
As far as little fabrication that isn't the norm for an M715.
The shackle flip on the rear will also require you to cut the rivets and the pin where it passes through the frame on the rear front spring mount and flip it as well.
The front will require you to weld on new spring perches, then flip the tie rods to the top of the steering arms and retaper the holes. You'll also need to trip the hole in the crossmember to allow the front driveshaft more travel downward.
Of course new shocks, brake hoses etc are the norm too.
Do a quick search and you'll come up with a ton of info on the subject.
Oh and welcome to the madness!
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