What to look for when purchasing?

[JohnKimble]

Hello,

I'm new to the forums and have been looking into purchasing an old K10 for a while now. More specifically I've been eyeing a couple '87 Silverado's (V10 technically). I've heard good things about the TBI 350 but was curious as to what to look for specifically when purchasing one of these trucks.

My state has strict smog regulations, so what original emissions equipment do I need to verify the truck still has?

Specific areas susceptible to rust? I've read the lower door jams can be an issue, any other areas to take note of?

How can I visually verify the block is a 350 and not a 305, or something else?

Any other tips for purchase are welcome.

Thank you.