It all depends on how and where the tank is installed. In my case, it went in before the cabin
trunk went on and, after removing a fence and the restraining straps, had to use a saws-all to 'help' the tank get through the hatch
For some helpful pics of a similar boat doing this project
, you might visit nineofcups.com and look for the pics and discussion of how David replaced their tank. As I recall
, a key component of the project
, since they were in an area without a lot of tool shops, was his ability to find a 'fine saw' from one of the other boats. This allowed him to make very clean cuts to sections of the cabin sole
(above the tank), thereby refitting the pieces without degrading the appearance of the sole.