A nice option for road use because Spherical bearings can rattle and drive you nuts is to shorten up the spring perch and make a flat plate top mount to suit the car and then get hold of a pair of S30 early 240~260Z front strut tops and offset the mounting points on the flat plate mount on the strut tower to where you wish it, The plate is required as an adapter because the Zed tops are much smaller than other datsuns but bolt up to your strut shafts OK.

The Zed tops are a much smaller diameter and allow more leeway in locating in the strut tower but are best used with 4 inch diameter spring conversion at the same time and are low maintenance items that live real nice in the real world for a road car, Oh and they are firmer rubber than the average Datto as well as more compact so a nice road mod that also works OK for occasional Motorsport use on tar and perfectly reliable off road for rallying.