I finished up the mending of my gas tank and the sealing of the interior.  Details are in the 2009 photos.  Seems to have worked pretty good, judging by how the interior of the tank looks now.  I used "Fast Steel" on the outside (JB weld product, I think) as solder was just not working.  Seems to have worked quite well.  I fixed up the larger rust holes, and the interior sealant sealed off all the pin hole leaks.  All my leaks were on the top of the tank, not the bottom.  Originally there was about 8 gallons of gas still in the tank, so all the rusting occurred at the top.  Local radiator shop would not work on it, said they did not want to try and braze it because the metal would just stress too much.  They recommended the Fast Steel on the larger holes, and that the interior sealant will take care of the pinholes. So we'll see how it goes in the long run.  I still have to paint the exterior with the Tank Tone I purchased from Eastwood.  I painted the exterior with POR-15 Metal, and then top coated with the Tank-Tone.  I'm very pleased with the results, and it is rock solid.  The new sending unit and cap make this good to go for re-install (someday...)