Stringers, hmmm. If there's one thing I'm not 100% sure about would be the stringers on my '72. Not because I notice anything suspicious (besides previously rotten transom) but the thing is I can't see them.
What I do know is I used the boat about 20 times over a year's time and never noticed a problem with floor or stringers - and that was before the new transom!!
But, just because the floor seems solid and you don't notice a problem, does that mean the stringers are solid?? ??? ??? ??? The only way to know for sure would be to see them right?
Here's an ad I put on Craig's List. I have more pictures, but none are great:
http://charlotte.craigslist.org/boa/145620202.html
Actually has pedistal seats now like this:
