The firing order sounds correct. Next.
There is a simple method to adjusting valves. It works on all engines.
Go one cylinder at a time and adjust the intake valve as the exhaust valve opens and adjust the exhaust valve as the intake valve closes.
Like I said, always keep this method in mind and you can adjust every engine in this manner.
I just wanted to check in to make sure that my information was helpful.
Please let me know..Thanks, Josh