doh! I hate it when I buy new parts for no reason!

hehehe

Check all of your rubber fuel lines, the one going from sending unit to the fuel line near the gas tank, theres one underneath the fuel pump, and one under the passenger side exhaust manifold, or at least thats what is on my 69. After re-installing my gas tank I noticed the one coming from the sending unit was kinking up. When reinstalling the gas tank I found it's best to go slow and check everything as you get it back in place.