Hello all, this is my first crack at a timing belt and man... it's already daunting... I can't find the OT mark and I have gone round and round with my endoscope. I'm thankful I have it because the picture and videos show a slash that I think is the timing mark but I'm not 100% sure. Flywheel kind of looks like it came off the Titanic.
The reason it's shiney is I sprayed some WD 40 on it to see if it would show up any better... The answer is definitely... Eh... Maybe...
Anyway I think at the very end of the video you will see the timing mark go by.
Also when I lock every down, where should that slash line up with the indicator? Just before or just after? I don't trust the markings on the front of the engine. They don't seem to line up very well.
Thanks all!
Timing mark confirmation 1987 944 8v
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MusketStyle
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Tom
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Titanic indeed. 
I think you circled the mark in those stills at the end. If in doubt, pull the spark plug out and watch the piston with a flashlight or put a wooden dowel in hole to watch the piston rise and peak at TDC. There's also a mark/groove at the bottom you can use. See Clarks... https://www.clarks-garage.com/shop-manual/eng-13.htm
Also, welcome to Carpokes.
I think you circled the mark in those stills at the end. If in doubt, pull the spark plug out and watch the piston with a flashlight or put a wooden dowel in hole to watch the piston rise and peak at TDC. There's also a mark/groove at the bottom you can use. See Clarks... https://www.clarks-garage.com/shop-manual/eng-13.htmAlso, welcome to Carpokes.
Yes, your flywheel looks much like mine. What I wound up doing was pulling the #1 sparkplug and sticking a long handled plastic spoon, handle first, down the sparkplug hole and turning the crank with a socket until I could feel the piston at TDC. It took a couple of complete rotations, holding the spoon and turning the crank before I got the feel of where TDC was.