I also use a D1 V8 as a daily drive for long motor way hauls, towing caravan, towing car trailer, bit of green laning, driving about in the snow when it happens!
It's set up as follows
Famous Four HD standard height springs (which give a slight lift but nothing massive)
Bilstein Dampers
Standard bushes on axle end and Polybushes on chassis end of arms
I've had this setup for around 5 years and it performs all tasks well, giving a nice feel on the road but removing some of the wallow normally found, tows well and still allows me to park up in a multistory when I visit such places.