Gas Tank

got a 65 barracuda, either been having vapor lock or some other problem. anyway i want to drop and either clean my gas tank or replace it..What should i do. know i dont have a garage. i got to do everything drive way style. and should i replace the sending unit or clean it some how. im not too experienced but this article scared me a little bit.

http://www.moparmusclemagazine.com/techarticles/10055_fuel_tank_replacement/index.html