[BirdDog]

If it were me, I'd probably fill her with oil and then pull the front engine cover (behind the seats), put a long handled breaker bar on the front pulley bolt, and slowly turn her over twice by hand (with the ignition off). Maybe even pull all the plugs to make turning her over easier. If I didn't feel a piston hit a valve, I'd pull the fuel pump relay and crank her over by key until the oil pressure light went out (to pump up the tensioners without starting it). If that went well I'd reinstall the fuel pump relay (and plugs if I had pulled them) and say a little prayer before trying to start her...

The noise you heard could have just been chain rattle because the tensioners weren't pumped up. But 5 seconds is a LONG time, and there's a chance one of the chains jumped a tooth. If it did, the damage is probably already done, so I don't think proceeding the way I described above would hurt anything. But I'm not an expert... it's just what I would try...