I'm looking to buy a 69-72 K5. Sorry to sound stupid, but what are the weak links I should know about when I'm looking at one? Do the 1st gen's have the same steering box/frame problem as the 2nds? Also, what's the difference between the single wall and double wall top (why is one better than the other)? And finally, would I be giving up anything by going with a 4-speed instead of a 350 auto? I'm not new to the old 4x4 scene, but my daily driver pick-up needs another bow-tie to keep it company, and got tired of being the rescue vehicle when the POS Scout I used to have broke down. And, I finally have some cash to get what I really wanted in the first place. If any of y'all could help a country boy out, I'd appreciate it.