While my Big Block is at the machine shop, I am redoing the firewall. I need the gasket that goes behind the wiper motor. Also, when the a/c box is removed, there is a figure 8 shaped gasket that goes around the 2 heater core tubes. Looks to be made out of foam or something. Any clues as to where these might be found? Oh yeah, 1980 C10 2WD...thanks.