You say you love the 70`s and 80`s look, one thing that they uesd to do that is highly illegal and needs to be treated carefully when done as it really isnt the safest (but hey wheres the fun if everythings safe lol),
They would take the diff out and mount it under the springs which immediately gives you about 4-5 inches of lift. Dont try burnouts of handbrakies like this as the diff isnt as secure as in its original position. Its a quick and easy lift solution and very period correct