[big job]

My two cents, by now those long pry bars are useless they did work when the engine
probably was in its prime. Simply use a spring compressor remove keepers remove
springs, valves and bang the guide down with a 5/8 socket no damage what so ever.
Good practice to stick a magnet in the area of those little trolls 'keepers' when removing.
When assembling, now you can use the bar.