318 LA rebuild after losing a valve seat

Not sure yet, is there a way to determine that without the pistons installed? My biggest concern is since I didn’t buy pistons with reliefs and a cam with more lift, that I may have an issue with the exhaust valve contacting the piston. What are your thoughts?

The lift is not the issue. It's the duration. It's the "when" and "how long" the valve is open. Not "how much".