76 Scamp A/C

I didn't think 12 oz was going to be enough R-134A. You're probably going to need somewhere between 24 and 36 oz.

The cycling switch you're looking for was used on earlier A body cars. Some thing like ackits.com part numbers 32-20916 or 32-20904. So, look for a switch for an early 70's A body. It will have a capillary tube that goes into the evaporator cooling fins and mounts on the outside of the evaporator case. It gets wired in series with the compressor clutch power feed.