Newbie (sorta) with some questions

[procrastinator]

In the distant past I owned a 68 C10 and a 69 Panel. I knew I would regret leaving them behind when I became 40 years old, but I was getting out of the Military and I need to go to College and find a career. Nearly 20 years later, I have built a couple of nice diesel trucks, a really nice show fox body mustang, but I have always kept looking and thinking about the 67-72 Chevrolet/GMC.

I am thinking about selling the mustang and looking for a 67-72 Suburban. I have the family now and we all want to go cruising.

I remember a lot about these trucks, but my questions are:

What areas I should be looking for when I look at them?

What areas are the most prone to rot?

Which doors are best? My panel had barndoors and I hated the hinges.

How is the aftermarket for these trucks now?

I would like to install A/C for the family. Is it best to find an original A/C truck or go completely aftermarket?

How do the suburbans drive/ride compare to today's trucks. Please mind, I drive a one ton dually so I don't need a caddy ride.

I am sorry for so many questions, I am just getting anxious to get on with my dream.

Thanks,

Proscrastinator