You may want to crawl under and use a hand pressure washer to wash everything first. maybe a shop vac. Has the fuel pump been working ok on the rear tank, you may want to change the pump. I don't think you will every want to pull the tank out again. I had to cut the bolts off with a sawsall or something that won't cause sparks. You may want to get a few new bolts before you start. Tank should come with a gasket and locking ring for the pump.