new aftermarket. Fuel Tank - Diesel Engine - Fuel System - 36 - 36 - Ford - TractorsTRYING TO FIGURE OUT HOW TO REPLACE MY LATE 70 ,EARLY 80 FORD 3600 DIESEL FUEL TANK . I HAVE LOOKED ALL OVER THE INTERNET,YOU TUBE ,ETC. MY MANUALS THAT I HAVE DO NOT SHOW ANYTHING ABOUT IT . ANY HELP WOULD BE APPRECIATED.