Interesting car there. I noticed that you did not say motor was matching numbers. That would be a big item when it comes to price. The motor appears to have been out at one time since the motor mount bolts are installed with one facing down and the other facing up. That is kind of funny actually. Odd that the whole balance tube is stripped; Fast Idle control and everything, not just smog.
The thing that is really bugging me in the pics is the dash. It is not original as the grain looks way too coarse and does not match the glove box door. Perhaps it is a 'Just Dashes' dash. I don't think it is a cap from the pics, but hard to tell.
In it's favor, the car does have a lot of original stuff (seats, muffler, Paint (?)) and looks great.
Given the above items, I would say the car is worth somewhere between $20K to $35K. The low number would be if the engine is not matching numbers. High end is if motor is matching numbers and paint is real nice.
Just my opinion....feel free to ignore.