Looks like they really want to move it. There was a brief discussion last week...
ZL1 "Tribute" Car on CollectorCarTraderOnline
I would expect a mostly NOS ZL-1 engine to cost $25-$35k (Heartbeat City) plus a cleaned up big block car $30-$35K = $55-$70K. Where's the other $15-$30K come from? That's a lot of factory inspection markings...
And that assumes it was a 396 car to start with -- no trim tag info...