1978 280zx - what is a good deal?

A lot of the smog stuff has been removed and/or blocked off. Might not be a concern if you're in an area that doesn't require a smog check. But I'm kind of concerned about how it was removed. The valve cover breather is t'd into the auxiliary air valve. The egr valve is gone, the place where the aux air valve should feed into is capped, the bpt valve is gone, which would mean that the termal vacuum valve either has been capped or removed, the vacuum delay valve is gone, etc. I just hope that all works okay.