Rather than tinted glass, I would do full sheet metal in Sedan Delivery style.
Rather than tinted glass, I would do full sheet metal in Sedan Delivery style.
When I was stationed in Japan, I saw several "sedan deliveries" based on Datsun wagons, and 1 or 2 on Toyotas. In Japan, they did 1 of 2 things: made a panel truck out of the 4 door wagon by using sheetmetal on the rearmost windows (like the blue Nissan Sunny wagon here) or they added a second set of doors to a pickup truck and added a full cap with no windows to that. I've seen 4 door 620 and 720 Nissans in Asia, nearly always in a off-white color.
You might want to try this on a car that's a little easier to find, like a RWD Volvo wagon.