Hi y'all. After finding bad fuel full of sediment downstream of the fuel pump on a '66/292 that I have owned for 15 years, I yanked the tank and found a very small leak in one of the corners, and a corroded sending unit. The gage has never worked. My mechanic tells me he could etch and seal the inside. The chemicals for this are $120 but he has chemicals from another tank. I found a replacement tank at Classic Industries for $150. I am wondering if anyone has experience with sealing the inside. I did a similar operation on a hypolon inflatable raft years ago and thought it worked well. Also, is the a visible difference between the 30 and 90 ohms sending unit. The replacement sending unit on websites is described as the 0-30 ohms. Thanks for the help.