Natural Gas to Propane Conversion - Raypak

Hi I have a raypak 377a natural gas and I need to convert to propane, can I just replace the pilot assembly orifície or I need to replace booth gas valve and pilot assembly? Thank you
Gas valve, pilot burner, all orifices need to be replaced. Burner orifices have a smaller opening for propane gas. There is also a tab on the circuit board that needs to be broken off.
 
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