New Square

[GM1]

Just got passed down a 1982 Sierra inline 6 cylinders 4.1 L. This is my first square and excited even though i don't have any mechanic skills. My plan is to eventually get her fixed up with new paint and engine, but in the mean time i want to get her running reliably with a/c (a must have in Houston).

Any recommendations on how to go about installing the a/c.?

The inline fuel filter had a red/brownish color so i took down the gas tank to see if the tank needed to be cleaned or replaced. The tank looked good, but i noticed one of the lines on the fuel sending unit was broken due to rust (yellow arrow is pointing to rusted line). I don't know what the purpose of this line is or if anything is connected to it. I will greatly appreciate any feedback.

Any suggestions on how to go about fixing the rot at the bottom side of the cab?


Thanks in advance!