KGBnut,There is rust, and then there is RUST. Mine was a barn-find that sat since 1964. When I first got it on the road, it would clog up with rust every few days.
I threw in a length of chain and sloshed it around... filled, drained, strained, rinsed and repeated. I still get tiny bits in my fuel bowl, but a couple of neodymium magnets under the tank near the shut off catch the big pieces.
I drive mine a lot, and have had no problems in two years.
From what I have heard, pulling the tank is not hard. The challenge is getting it back in, and lining up the welting.
Welcome to the Barn ! Before you go looking to pull the tank, how badly is it rusted, try doing a search for various ways others have used. If not bad you might get away with flushing, installing a standup fer in the tank. FWIW
Paul in CT
So far I have removed, no BS, almost 5 pounds of rust, sediment and what may have been a coating. Taking it all out from the fuel cap hole with a home made sheet metal ladle. What a pain in the ***! Multiple refills of filtered gas and rocking the car back and fourth, repeat. Almost clean, almost. Have been on the side of the road cleaning out a clogged sediment bowl and add on filter, multiple times. I am able to drive it farther each time. Lol! Taking the tank out is the correct way, my way is just a challenge! There is stuff still hiden behind the baffles. Always makes for a fun "do ya think will make it without a break down" ride!