So i got my a/c checked out and this is what they said.

"Recommend replacing Expansion block, Receive dryer, Pressure switch, Flush system."

What is an Expansion Block?
I have a parts car with a/c and was curious to try and see if any of those parts might be good on it.

 

The A/C system does have an "expansion valve."

 

thats what i was thinking but not sure if its the same.