My friend have 2000 ford expedition Eddie Bauer 5.4L Triton V8.It was brought from someone who had taken the passenger (R) cylinder head off for repair. While the head was off, and the (L) head is still connected to the crankshaft by means of the other timing chain, one of our friend told him that it's possible that his son had turned the crankshaft a couple of times, so he can't be sure whether piston #1 is at TDC of its compression stroke or its exhaust stroke. Do you think there's a way of telling by looking at the position of the valves on the (L) cylinder head which is still attached?