Gas tank insanity-please help!!!

[oldgold70c10]

It wasn't raining here in OK, so I decided to pull my sender unit this weekend and install the new float I got from LMC Truck. (old float is full of gas). Well, that is when the fun statred.

After puting everything back together, with 1/2 tank it still said empty. So I took it apart again and checked that the electrical part of the sender still works, and with the help of some aligator clip leads, it does, even reads 1/2 with the float at the 1/2 point.

Well, to make all this short, my float floats if I tie a string to it and drop it in the tank, but if I attach it to the sender lever, it sinks. The lever moves very freely (it is supposed to, right?), no binds, nothing. I even wire brished all the rust off of it hoping to make it light enough, but it still won't float in gas. It will float properly in water, but not in gas. (gas is less dense than water)

Has anybody had this problem? Maybe LMC's float isn't big enough/too heavy?