Hi,
No modifications needed to install the Street Rally pegs, they fit perfectly and the package contains everything you need to install them.
But you do have to grind the bolt with a power drill on the original left peg in order to remove it, it doesn't have a pin like the right one for some reason.
Here's a photo of the original bolt once removed (borrowed on the french FJ forum):
[EDIT] sorry, didn't see the previous post. But I guess you have the answer above: no modification needed, all good