If you'd found a car which is very very very very old, 1970s with registration card, you can use chop shop engine and stuff to put in to your car. JPJ will pass your car inspection. Old engine hard to find, so JPJ let you mod the engine mounting in your car to accommodate the new engine. Be it RB26DETT, they still pass.
My friend had a very old Datsun Laurel (his wedding car), old engine OHV engine, once "accidentally" overreved, KabooOoOOm!! Put in RB26DETT, JPJ pass inspection, because original engine no produce edi, here don't have RB20, so he ordered a RB26DETT from W Msia flown in, put it in, upgrade everything, heck he even have a anti-roll cage installed, JPJ also let him pass inspection as safety equipment, according to him. Don't know what "procedure" he had gone through but the car registration really got RB26DETT engine registered. Now he's the happiest man on earth, always fly here and there, tapau every1. LoL... Hope this give you some information for making a chop shop + Old car.