I know you're looking for a spare head, and I don't have one, sorry. I do have a 331 pump I have apart at the moment.
I just took it apart on Tuesday night. It was my old shop compressor before I upgraded to a Champion a few years back. It had gotten a bit weak, but functional, and at that point in my career, I was hesitant to take it apart and see what it needed-compressors were a mystery then and the internet was not so prevalent, and certainly, I had no idea that other freaks existed who loved old ****.
So basically when I took it apart the other day, one of the intake valves had a broken spring, the intake manifold (ahead of the valves but after the air filter) was full of about 50 years of body shop dust and some of the other springs were weak, or at least the discs were leaky...not as bad as I had thought it could be.
Amazingly enough the cylinder bores in the 331 appear fine-slight discoloration from corrosion but you can't feel it and the compressor never consumed oil so I am leaving the bottom end alone. I would love to blast/epoxy prime and paint the whole damn thing but I need to focus on getting work done! I did see that someone on ebay has the old Kellogg stickers for the tank!
Years ago, when I did the above upgrade, I got in a bind while between compressors. Scales air compressor was about 6 miles from my shop, in Meriden, Ct (Home of Chas. Parker vises for those paying close attention!) and the guys stayed late on a Friday night to get me the pressure switch I needed. It was pouring rain, but a 12 pack of beer made their day/night. They are the best.
Anyway, back to the point, you can get the parts easily-no need for a spare head-as you can have the parts in a couple of days courtesy of Scales.
I called Dave in the parts dept. on Tuesday and he said no problem on the rebuild/servicing kit for the Kellogg-I should see it tomorrow it is getting drop shipped. I forget how much, but as the compressor is fine otherwise that's what I'll contain my work to right now.
Matt
