The Eagle shackle is an oddball that has 2.5" width at the bottom and 2" width at the top. It also sits on a little hump. I cut the hump off my Red SX4 and bolted up CJ7 heavy duty eyes (2.5" wide) and then used CJ7 lift shackles. Eagle Shackles were at least 1/2" longer than CJ7 shackles and then I also lost the height of the hump, so I got CJ7 shackles advertised to lift 1" or 2". They were cheap, heavy duty, and available with grease fittings. It's worth doing to my other Eagles, especially since I can save over $100 using XJ springs instead of Eagle springs.
On the SX4 I already upgraded the shackles on I want to try XJ leaf springs. I don't know if the extra 1-5/8" in length will fit in an SX4. It should certainly work to make up the tiny difference between XJ and station wagon leafs. It's just a matter of moving the holes along the flat plate I added where the hump used to be.
At this point my only concern is the diameter of the bushing. It's bigger on an XJ, but should still fit in an Eagle bracket.