04 chevy quad cab box, where?

Custom building is sometimes the key as it allows a lot more flexibility and sense of pride in your work. However, the customer is also the person who must pay for it. Custom fabrication is usually more expensive than a prefab box and it is always a much quicker job. In this case it sounds like the customer just wants a little bottom end and does not mind the basic box under the rear seat. If this is case then you get what the customer wants but always recommend what the customer should have. The customer is the one to decide and it is always best to let the customer know about any and all possibilities.