Trying to rebuild a previous torn down 82 ATC 70. In the rebuild kit I got, it has 2 smaller valve seals, and 2 larger seals with oring on it. Head had a stuck valve, s##t went flying when I took off the keeper. Anyway, I have seen parts diagrams showing valve seals and seal retainers on both the exhaust and intake valves. My haynes ATC book says that no seal or seal retainer is used on the intake valve? True or false? And is the larger valve seal retainer that goes on after the valve seal, steel or rubber?, because I did not seem to have that on the valve when it was taken apart. Thanks