So here it is (Cheers John)
My donated die cast is clearly a bit too big! However mulling over the problem John suggested that if I lowered the suspension a bit maybe that would work ? And a project was born.
I dismantled the truck and went to work with a Dremel
I relocating the axles as far up as I could - about 8mm in this case. It looks a mess from underneath but is pretty much invisible from other angles. This has brought the whole model down to a much more reasonable height - though it still looks BIG it now looks a bit more in proportion with the figures, who can now see over the mudguards without using a ladder :-)
That done the next step is to repaint it. I wanted to keep the clear plastic windows, so I removed them and sprayed the now disassembled cab and chassis in a nice Russian green before reassembling.
I have to admit I like the look of the new Ural "Lowrider" and I think it will make a nice addition to our games.