Very cool. You have some seriously thumping tubs here! They are 3 very thin plies of mahogany. I treat these in a particular way to both save the brittle interior ply and to increase the resonance.
First, remove all hardware and lightly sand the interiors using 100 grit, then to a fine 220 grit. This is a bit of work, but in the end, you will be happier and the drums will have a new life. Once the wood is smooth and the grain is "closed", you can coat it in one of several types of sealant. I use a clear lacquer because it is more of a "natural" substance and it dries fairly hard yet remains breathable. Poly is a plastic and does not breath and changes the resonance of the shell enough that the mics will know. One or maybe two coats is really all you need as you are not trying to make it a solid surface, it is only to seal the wood and make it more resonant. These shells are seriously low and woody, very smokey in tone. I love these shells, my WMP Pearl early 60s stencil no name set has these shells and everyone that sits down to play them immediatly asks to buy them.
Do not change the original contour of the bearing edges, but do yourself a favor and sand them smooth as well and then wax them or treat them with an edge treatment. This makes tuning easier, allowing the heads to slide more easily over the edges and tuning then becomes very smooth. I do this to all of my drums, "burninshing" the edges and waxing them, if you use wax, make it beeswax. Waxing is not merely rubbing it on. You have to work the wax into the wood, thus "burnishing" it.
As for heads, you may wamt to go back with simple Remo Ambys or a thin coated head that is more calf like as these are old school shells and seem to like to vibrate freely. Low tuning is best as trying to hold high tension on these shells causes them to cave in and crack. Use the lowest tuning you can get away with.
Good luck with them, and if you need more info or want to see any repair how-to vids, follow the link in my signature to my youtube page to see them and if you have a problem not listed, I can make one for you if I have something that I can make the video with.