Okay, thanks for the input. I will disconnect the electrical and add it to the bottom of my to do list. I don't have a stock of R12 hidden away so unless someone wants to give me a hand I will be going with R134a. I just want to get the system clean. Not looking forward to doing this once, and I definetely don't want to be doing it twice!

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'84 300D Turbo Diesel
San Jose, CA