Been there and my tank maker messed it up with square corners where sending unit / float sits so tank will not fit under the frame plate. There's three different shaped tanks for the 1930 to 1932 and I think yours is oval or roundish. Mine is the last type sort of triangle and rounded where the points on a triangle would be.
I was faced with same problem of 40 plus years of what was gas now liquid ? that reeked. My bro and I took off the tank and set it on the shed floor. Next morning this fluid had leaked out, and down the laneway to the road. I'm sure the neighbours really appreciated the odor ... not. lol.
Sending unit as pot metal gears and fused into a blue chunk. What I did was have a Hot Rod shop send me an adjustable length sending unit. (you cut off what you don't need) that covered the ohm needed to be used on our vehicles. Horton Enterprises Inc in Milton Ont. http://www.horton.on.ca/
My bill says Part number SN38 Tank Sender: 90 ohm: 24 inch adjustable: CLA
If you need the rubber cap over the sending unit Steele Rubber Prod in Denver NC has those. Part number 10-0010-44 http://www.steelerubber.com/
DMACer's might have come up with other idea's on the sending unit.
This place repairs the units.
Atwater Kent Manufacturing Company
2 Jacques St.
Worcester, MA 01603
Telephone: +1.508.792.9500
http://atwaterkentmfg.com/
Not related to that part on the car but water pump packing is another where do I get that ? Went to NAPA and they looked at me like I had two heads. Not a clue what it was. Lets try TSC (Tractor Supply Store) .. better, they had heard of it and should be on the floor to buy but was out of it. Ok lets try an actual farm tractor place. Nope but they did sell all sorts of fan belts that had I known my size they would have had one. Then the light came on and lets try a plumbing shop while out in the country. Old taps and farm water pumps still need water pump packing. Fellow said how many feet do you want and I bought 3 feet. More than enough to do a few cars. Now the kicker of me running all over the countryside looking for packing. My neighbour across the road is a retired plumber and he said why didn't you ask me. lol.
Where Are You From? Ottawa, Ont
Do You own a car built by Durant? Dominion built 1932 614 Sedan
Yes, the tank is round/cylinder. I have to take a picture of the new one but here is the old one on the floor. The new tank is a copy of the old one with the fill pipe/gap etc. taken from the old tank. Great metal work and it cost me 200 euros, I think it was a bargain.
Is the sending unit ohm readings from empty 0 - 90 ohms full?
That's what I thought, it was round. Been a long time since the 60's when I had 1930 614 sedan. Cost me $300 for this thing I can't use. That sending unit stand is round and the fabricator made a square box on mine grrr .. You would think having my tank as a model plus working on rod rods for people he could make round objects. The place is a metal shop and does work for the government and cars as well.
See if I can copy mine and the squarish mess tank.
Where Are You From? Ottawa, Ont
Do You own a car built by Durant? Dominion built 1932 614 Sedan