sorry
I should have read more carefully.
If someone has already been doing safety work,assuming it has an ejection port on the right side,and a left hand safety.It maybe as simple as removing the safety spring retaining pin,safety spring, safety plunger and safety ,reassemble with the red band to the right.
This is assuming that at the back of the trigger plate (triggergard assembly)there are two holes drilled for the safety plunger ,one for right hand use and one for left hand use. Assemble using the safety plunger hole on the right side hole. Encyclopedia of Modern Firearms details how its done.