I'm getting close to reupholstering the seats in my '53 pickup. The kit I have has the sewn vinyl covers, burlap, cotton stuffing, and some "blanket" material maybe 1/2" thick. Where does each go? The old seats were in fair condition. The back seemed to have only burlap and the vinyl, with no cotton stuffing. The seat base had burlap on the springs, then stuffing, then the cover. I understand burlap over the springs. But then then I'm not sure where to use cotton stuffing and where to use the blanket material. Thanks for any tips!