Hey Guys... I pulled the master cylinder off my 71 (all drum manual brakes) to strip and refinish it and the seal (gasket) between the MC and firewall was in rough shape. I've looked around and the only place I see that has it is oldmusclecars.com. The old one is made of rubber but the one at this site looks to be paper. Does it matter? Is it best to search out for a rubber one and does anyone know a place that has them?

Thanks

Pat