Good morning all !! I went engine forum and with their help my 120 purrs like a kitten. Just starting to disassemble my 21’ chieftain. It had 2 12 gal fuel tanks each sine of engine. I’m pulling floor next. Does anyone know if there is enough room under floor somewhere to accommodate a large fuel tank ? I would like to use the extra room in aft. Also I would like to lower the floor in center of cabin. Has anyone achieved this. Thank you in advance