the only concern from a structural point of view are the stringers. Some builders used wood stringers and didnt' do a good job sealing the wood. Water gets in (even if it's not a sinker like that POS), wood rots and the stringers are done.
but even if the stringers (and bulkhead if they used wood) are good, fixing this boat is going to require a ton of work and parts. Even if the engines have been properly stored, you still have do deal with wiring, generator, pumps, air cons, fridge, etc... which are all likely to be toast. what about the fuel tanks?
as to the engines, why were they removed? you dont pull inboards when storing... and even if they were un damaged, how where tehry stored.
yikes, even free rebuilding this boat may coast more than one that's in good shae...