I know the joint where the bottom of the firewall and the floor come together was seam sealed at the factory on the interior side of the joint. My car is a '68.
Was there any sealing done on this joint from the factory on the bottom side of the car. Looking at pictures I took of the bottom of my car before the floor was replaced, I don't see any.
If it was not sealed from the factory, is it a good idea to do that now? I thought I had read somewhere that it was not a good idea to seam a joint like that from both sides. I don't remember the reason why though.