\'78 K5 - what came stock? I just bought a '78 K5, and after reading some 4x4 mags and this forum, have come to realize I don't even know what I am driving. I know it has the 350 cid motor and an NP205 x-fer case. It's the four speed manual, so is that an SM435? What is that? What axles might I have? What is the difference between a "corporate" axel and say a Dana other than manufacturer? Thanks in advance, I'm tired of being ignorant.