the front he has changed the struts, so pretty easy, the rear still running the torsion bars by the look, so not sure how he has done that,
if he is running an EJ22, then probably a EJ box so front axles are easy, rears not so much ( unless he running a later Diff)
ask him to come back and have alook, he will have some supporters here as LPG + Supercharging make alot of sense to me