Actually the Australian VB310 Sunny Panel van was leaf spring as elsewhere and solid sides no windows at all and like all Sunny B310 models in Australia full imports, they were all also just a cooking A12.

Mine went through A14 GX then L20B which even in SSS spec went no better than the A14 GX engine both ran the appropriate 5 speed so ratios were similar between the overdrive type 60 and the overdrive type 63 boxes, However man did it stop when I dropped in a spare set of Works Stanza struts works vented disks and four spots strangely enough brake balance with stock rear drums worked out perfectly with that setup.

Wish I still had it as they were rare back then let alone now, Six years ago when I was working in Bowral in the Southern Highlands one of my Customers had a Sunny van and his checking found just one other registered in NSW at the time.