[Bobboloo]

I know your familiar with the body but I've been familiar with these cars for ten years and I still make mistakes at times assessing rust. Especially if its hidden.
It's funny that people talk alot about the pans because it's been my experience that, although you do come across cars with rusted out pans (which I would run from), the problem points I see the most are not the floors but the suspension pan, the A and C pillars. As matter of fact my most recent purchase, a 72'T Targa, looked good in the suspension pan from visual inspection but actually was rusting from the inside out do to battery acid. You could not see this from underneath or from inside the trunk. It was only revealed by pushing on the pan from underneath which revealed soft metal.
Another place you can't see but you should check with your finger is to reach under the dash pad on the far right and far left to feel for rust. When the windshield seal goes the water gets in and it sits under the seal and is pushed by the wind under the dash pad.

On the mechanical side. If the car "just needs a clutch" be aware that it may not be just a clutch but it may also be the input shaft seal. This is no big deal on later 915's but on most of the 72's it's a very expensive repair to replace that $2 seal because it requires partial dissassembly of the tranny.

Bobby
72'T Coupe
72'T Roadster Project