Never seen one of these? What are they used for? Also, You should make a chip sealer truck if possible! My town uses them every year!
This is what hauls the emulsified asphalt from the plant to the jobsite to be pumped into the distributor truck that you are talking about. And I would love to make a distributor and chip spreader, but I havent been able to find models for them yet!
You could use the AR Tanker pack? Maybe modify the wheel loader alot? Hope that can be made sometime!