I presume that is a stud in the first photo ?

Just remove it and fit a shallow head bolt as per the lower fastener in the photo ? Or just shorten the threads of the stud and use a half nut.

And ensure good strong engine mounts.

or as others said, just move it a little to the side, even a small spacer giving the unit a small angle would not hurt how it operates, but would give you additional clearance at the manifold side.