I am building a few trukks based off 1930s cars that are 1/24 scale. See WIP thread on the-waaagh.com. Some of the suspension layouts I am experimenting with make me think of rat rods and hot rods.
Many have made great ork hot rods and one great one is from Scott Schoemaker.
I will probably build at least a couple trukks in this style, just not so well, from the cars I have.
Angel of Death 007 took an actual roadster kit to make an ork trukk. See link and update and update and update and final pics. I like how the front windows are beside the front engine area, not above it.