Now it runs....and pumps...
Phil, here is how I do it by myself...
to take it out, I jack it up by the diff until the tires are just leaving the ground. Then I put a jack stand under the frame just in front of the rear tires on both sides. this gives me enuf room to crawl under the car, disconnect everything and lower the tank down on my chest. then I can slide out from under the tank and pull it out. One thing I do is to push the tank straps back out of the way before I slide out. the rear of the car has to be just high enuf to allow them to swing back without bending them up a lot. The worst part of this is getting the old fuel lines off and I always try to replace them so I just cut them to get them off...don't put your face under the lines while doing this because this new gas really tastes bad and it burns a lot.
It should go without saying that the tank should be down to a couple of gallons to lessen the weight. Gas weighs 6.5 lbs per gallon so it does not take too much in the tank to make it heavy.
To put it back in, I slide it under the car and pull it up on my Harbor Freight aluminum racing jack which does not weigh very much. Because the tank wants to slosh from end to end if there is any gas in it as was this case, I lay down on the floor on the passenger side of the jack and use my leg to pump the jack handle while I balance the tank and steer it into place. You have to watch the filler tube to make sure it is not binding and guide it into place as you jack, plus, at least on my car, the driver's side tail pipe is in the way so that the tank has to be slid further to the passenger side while tilting the drive's side up so the lip of the tank clears the pipe...then slide the tank back towards the drivers side while jacking with my leg. The lightweight jack makes it easy to move the tank into position where needed.
This would be easier with two people but it's not that bad by yourself if you just have a little patience.
It took me one hour to put it back into place and connect everything back up.