Well I have a 67 bird, and I installed a new gas tank, no problems there. The sending unit/gas gauge was working fine before the new tank swap.

I transferred the old sending unit to the new tank and now. Voila, the gas gauge needle is pegged way past full at the 3 'o clock position. When there is 5 gallons in the tank and also when the tank is full, the gauge is pegged at the 3 'o clock position.

I have checked the ground, and it is completely clean and on bare metal. I unhooked the sending unit power in the trunk (tan wire) and grounded it unhooked, gauge went to empty, meaning gauge is working fine.

I can't figure it out it was working fine before, could it be that power to the sending unit got crushed when I jacked up the tank to put the straps on??? The last thing I want to do was drop the tank again, getting that filler neck lined up was a pain in the neck.

anybody have any suggestions?

mine went pegged full, when it was disconnected inside the trunk, so just check all the connections

Don't forget the ground on the back of your gauge cluster.

yea the gauge works fine.

I think I'll bypass the connector in the trunk and see what that does...