Brian
Do you have a garage to do the work in now that it cold and about to snow ?
Is there enough room for splitting deck & hull, plus a motor on a stand ?
I have a torpedo heater you can use, smell's nasty but heat is heat when it's 20 degree's below zero ... LOL
The deck & rub rail should be screwed to hull, my 72 V-156 was at least, not sure how open bow is attached on bottom.
Mine was just resting on floor.
If there's any tabbing on the deck to hull joints, you should be able to get a tool up there through the cut out's for front seat bases.
On my CV ... I cut back floor until I got to solid wood, and could see that the stringer was wrapped and solid, hope yours is the same with just floor rot under splash well.
That should give you enough room to get the wet foam blocks out also ...
Jeff from " Rockwell One Day Transom's" thinks this will be an easy one !
We'll know for sure once we start ripping into it ...