I have a 79 K5 full time blazer and the transmission recently went out on it. I had it rebuilt by a friend of mine but upon putting it back in i noticed the seals on the 203 transfer case input shaft was cracked. I found those but i cant find any part # or even someone who knows what im referring to when i ask for the gasket that goes between the transfer case and the mounting plate. Can someone please help!!! I guess i can use silicone but i dont like to if i dont have to.