Frame off restoration

[Rags63]

I have started a restoration on a 63 that has been passed down I originally pulled the body to weld in a new rear crossmember. One thing led to another and now in the process of a full restoration. Things i have done so far. Striped the frame down painted it. All new suspension bushing front and rear new hardware rebuilt rear end 

My plan is to run new break/fuel lines finish up the steering tuner disk breaks front and rear new exhaust.

Looking for some advice on things to do before putting the body on. Also what should I use for rubber between the body and frame? Any advice is greatly appreciated thank you here are some photos of the progress 

[grant mills]

It is great to see the start of a restoration with fresh and newly painted parts ready for installation.  I also have a question that I posted elsewhere but still don't have an answer for.  Would you be able to tell me the height of the arc of rear leaf springs? That is, with the spring ends sitting on the ground, curve up, what is the distance from the center (connection point to frame) to the ground?  I would like to replace the current "flat" springs on my 1984, and there is a spring manufacturer close enough that will build them to specs..all of which I have except for the uninstalled height of the leaf spring. I know that EatonDetroitSpring has them, but It would be double the cost of a local manufacturer after Canadian $ exchange and shipping.