What should you do if BP vomits food that was too big?

[Lord Sorril]

Last few things to ask, IF he does it would it be safe to say it’d be within 48 hours of eating?

No, I've seen regurges a week later. The problem is that since the prey item is so large it takes much longer to digest so it takes a while before you know you are 'safe'.

And, because I’ve fed him this should I wait longer before feeding him next time?

I would wait until he has pooped before considering it...I would also make sure he has not triggered another shed cycle due to the large meal--if so, you are waiting again for him to finish.

Also is there a chance that he’d have gotten any respiratory issues?

If he regurgitates a partially digested item and aspirates digestive juices/food into his lung--then yes it is a definite probability. You won't know for certain until you are well past the date of the regurgitation.

Keep enough snakes for long enough and you are bound to see a regurgitation every now and then. I've never had any issues with my ball python colony getting secondary infections.