Here is my thread on it with pictures and lessons learned.
https://67-72chevytrucks.com/vboard/...d.php?t=790246
You can sand or media blast it and give it a clear coat and it will look nice. You will most likely need to work on the inside and sheet metal and hot/cold mix door as well. The rubber tube that goes from the blower motor to the housing is not reproduced, so if you have it you will need to be careful with it, save and patch cracks in it. I used super glue and black RTV. You can send the unit off for restoration if you like. F.A.A.benny has experience in that job.