To insulate or not to insulate

I am getting ready to attach the body to the frame on my 34. Right now, the body sits very snugly right on top of the frame rails. I can make attachment points just as it sits, or raise it slightly and add body to frame insulators. The motor and trans are mounted with rubber mounts. I am thinking that I would just mount it as it sits, right to the frame. Any thoughts?
Thanks
Arno

All cars of the era use some sort of insulating between frame and body. While the roads are much smoother, the speeds are higher. The frame will flex some, so I'd think that there would be some creaking.
I'd also worry about trapped stuff leading to rust. I'd go with a rubber or impregnated rub strips.

By all means, put some kind of insulater between the floor and the frame, or the squeeks and rattles will drive you nuts. No need to ask me how I know, some lessons you never forget. Gene