Yes, That is a must do.
yes
If I change the AC compressor in a car, do I have to change the orifice?
It isn't required or necessary.
Well, it does get sore after a while...
its not, the orifice headloss is higher because the change is abrupt.
change the gas flow metering orifice size
by converting them to Christianity
No, this is a chemical change.
No
It is made into the liquid line and the entire line has to be replaced.
You have to change the size of the gas suypply orifice.
Yes, Propane burns hotter.