PRO:
400, 4 speed
WS6 suspension
Looks clean inside and out.
Doesn't look butcheted or hacked
Cult following...value will go up
CON
Not running?
Pontiac uses the plastic tooth cam sprocket too.
Why sitting so long?
Rust hole...how extensive?
Headliner is separating. The T-top seals probably leaked a long time ago.
A/C compressor belt is off. Those GM a/c clutches suck, but replaceable. Sometimes they go south because the compressor shaft seal leaks.
Door shut lines and gaps look odd to me.
My friends had '72 and '74 models. Their cars were not structurally stiff. The door shut lines would close when the car was jacked. Hopefully, Pontiac stiffened them up when adding a T-top. That being said, the cult following would probably ignore the door shut lines.
The posi, if it has one, will need those slip plates (I don't recall the name) will need replacing after 130,000 miles. Use the correct lube and GM modifier.