Welcome Russ, we do our best to help ,doing the tank is easy first remove spare tire , second there is a hat like cover to remove some are bolted from under the car
5 bolts remove cover looking down that is the top of the gas tank
four bolts at the front and at the back at this point you can remove it 2 ways slide and drop or remove the rear cover and lift out after sitting that long it is a good idea to clean the old gas out and clean the scale out of the tank it should be aluminum You bought a good winter project car getting it all ready for spring and a lot of fun driving ,,,,,,,,,,,,,, Dan R