I removed the fill spout on my 3600 under bed tank today. I am going to build a new tank and will reuse the spout. I was going to look at the sending unit but there was a baffle in the way. But I found this instead.
Nice find! That sending unit should come right out the top. I removed the original sending unit from my '48 Chevy that was frozen tight but after a few days of soaking with Deep Creep it freed up. Still working a couple of years later even with the original cork float.
I threw them in a can of E85 to clean off the gunk, used a small hand wire brush to clean the rest off. no. 226 MADE IN THE USA . Does anybody recognize them? I also found a double open end wrench laying on the cement that fell after I removed the wood bed in the box. Definitely from back in that time period.