So I think I might have found my C-10

[Cole Trickle]

1969 Short Fleet

Truck has a newer crate motor (350)
4 speed manual (Factory original)
Power drums (6 lug)
Almost rust free (passenger side bottom of the door has a little)
AC (Looks factory but added about 7 years ago)

Here are my questions.....

Is a 350/4 speed manual factory truck rare at all? (I haven't found many)

How is the performance with this combo? Typically the 4 speeds are pretty bullet proof but I wouldnt exactly call it a performance based quick shifting tranny...lol

PO says the AC compressor will need to be replaced/fixed. He only gets about 2 months out of a charge before the coolness tapers off (whats a compressor go for?)

Truck has been a AZ/Utah truck its whole life....Where are some big time areas I should check for rust? (cab corners are good and so are floor boards)