i`m not sure where i read it (but think it was volvo300power.cjb)

but it was somthing about using sierra dampers for caravan in the rear, wich was working quite nicely..

is this for the original hight? or do you need more mods?

if you don`t know feel free to speculate, as long as it`s sane toughts

I don't think the sierra has the same type of mounting points as a 300 so would need brakets to make it fit.