If it isn't a Kingswood then it'd be very unlikely NOT to be a Sandman. Note that normal Sandman had commercial tyres. It was only the mid HJ on XX7 that passenger tyres.

Absinth, never seen different spec for leaf springs in any GMH documentation for reduced GVW. I have the full features listings including build sheets for both XX7 and XU3 and no difference in springs listed. Vans and utes never had 1-tonner size spings as standard. You could order tonner leafs as heavy duty option, but that was over and above standard 2155kg/2200kg GVW. Remember XU3 existed from day dot in Sandman, and ran through to the end. It was called XX7 at the start, but changed to XU3 mid HJ. It was the new package introduced mid HJ that then carried the XX7 code. The "normal" pacage didn't change mid HJ, it stayed the same. Softer springs were not fitted to the new reduced GVW Sandman.