I would make accurate measurements before actually cutting anything. The photos are just to get a rough idea from someone who's modded crankshafts before whether it's even worth putting in the effort to build a degree wheel to use on this engine. I'm happy enough with the performance of my other engines that I would only start modding their crankshafts if I ran out of absolutely anything else to occupy my time, so a degree wheel would almost certainly be used for this engine only. Therefore I'd rather not build one at all if it's unlikely I could actually use it to improve this engine.

For example, if someone were to say "yes, it looks like the intake timing is very conservative and you could keep the intake valve open for an extra 5 degrees and get a lot more top end", then that would make it worth my time to measure things carefully. Whereas if someone were to say "no, this engine is already optimized from the factory, mediocre though it is", then there would be no point in pursuing this project any further.