Valve Drop and Piston to Valve Clearance

when someone asks me “what’s the biggest cam I can stick in _____ (Enter whatever engine you’d like)? I just shake my head.

Why?
I don't.. I take the time to look at what they have and see if a bigger cam or even just a better cam may benefit the engine combo they have. I've had good results and some very happy customers by doing just that.