I used rubber body to frame bushings, forgot the exact size but got them from Denis Carpenter. He will sell the size you need so you don't buy the whole body/frame kit.
A little off the path, but you said you purchased the seats; can I ask if it was a private sale, parts supplier junk yard, E-Bay? The reason I ask is that I have a 41 Super Deluxe Club Coupe, (long door) and I need the rear seat assembly. Thanks
Will a rear seat and cushion from a 1942 Two door sedan fit in a 1941 Super Deluxe Club Coupe? Hopefully it will as I do not want to have to "alter" things to make it work, I have located the '42 seat but I don't want to purchase it if it won't work. Thanks,