I borrowed a sand blaster from OilHammer to try to get more of the rust off of the heater and defrost diverter.
The blaster was not working very well until I made this little device that helps it get more air and grab the sand particles. THANK YOU YOUTUBE.
This knob and shaft that controls the defrost cannot be sourced...at least I could not find anything anywhere.
So I used a little trick they use on old steering wheels...I cleaned out the cracks, drilled holes to help hold, and I filled all of the voids with epoxy putty.
Then I sanded the knob back to its original shape, sprayed it with adhesion promoter, and finally painted it using black bumper(plastic) paint.
In order to get the heater apart, I had to ruin several of the machine cap screws that hold it together...they were rusted threads. However, I was surprised to find out that these machine screws are the old JIS standard (prior to April 1997) and had an odd thread pitch no longer sold today. Well...except for these guys... BelMetric.com What a great company, and I had great customer service...parts arrived in just a couple of days. They also sell the metric sizes of fuel line and clamps, so I ordered some of that for my fuel system as well. Gonna buy some for the 80 series as well bc it's hard to find the metric size fuel line at the local parts stores.
Anyway....I am just waiting on the front sticker for the heater, and I'll post some more pictures when the heater is done. It's going to look a little weird in the old truck, since it looks too new. But, I certainly didn't feel like putting everything back together all rusty. This thing was such a pain in the arse to rebuild that I didn't want to do it twice!