If you want to get better cross-wind resistance, and good turn-in, keep the front slightly lower than the back or no higher when normally laden. I've also found Brickwerk's polybushes for the whole anti-roll-bar setup (except the knuckles) was a noticeable improvement on tarmac. Have the rack bushes too. The norm seems to be slightly higher at the front... I'd never go too far in that direction as it destroys good tarmac turn-in and cross-wind behaviour (drag probably too).
The Doka steers quite different to the vans due to the lower c.g. at the rear, and am pretty sure due to different torsional stiffness of the bodies.
I believe the load-rating is 3/4 ton, 750 Kg. ?
I've had big loads in the back of my Doka a few times... it's 'orrible! This was mainly on tarmac. The 2nd time was between 1.3 and 1.5 tons and I drove very gingerly. The rears were totally coil-bound and thought I'd break a pigtail, but didn't. This is with about 1" spacers back, none front.
I have original front shocks, new but HD (VW Syncro) ones rear.
3 biggest loads were estimated at 1 ton, 1.25 tons, 1.3~1.5 tons.
I can't believe it's wood chippings that's a weight problem as have had mine overflowing with these (needed tarp to contain them). Obviously you have tools and workers on board too...
But I'm suspecting we don't know enough about you van yet, and if it is quite tired, some new BY fronts & choose your shockers
The rear has often been a problem due to lack of availability of new std springs
1" spacers and some HD shocks would help a bit maybe.
All fairly cheap
Otherwise its a lottery, but I do like the idea of the adjustable AVOS!
And we need to hear a lot more about the GoWest spring offering... more detailed 1st hand accounts would be good, other than from GW.
And on that note, I had to chuckle a bit at this....
So, we are offering a 33% discount to anyone who purchased a s et of the other guys springs from GoWesty, and even 15% off if you did not buy them from us! And, if we installed them here at our shop, we will do the labor again at half price. All you need to do is show proof of purchase, and return the old springs to receive the credit. Now, THAT is putting our money where our mouth is!
We have worked long and hard on this project, and are thrilled with the results. You will be too!
Mmm... that's one way of taking them out of circulation... after dissing them so badly, certainly couldn't put them back up for sale, so only scrap value (or should that be crap value).
On the other hand, it's seems a fair offer, 33% off (but you can't flog them on eBay then)