Just needing to know what are the specs needed for wheel spacers for the EA-ELs to fit AU onward wheels on

i know the studs size is 1/2" and the thickness 35mm and the PCD 5-114.3(4.5”) ,

i need to know what size bore is needed the centre hole please anyone

Thank you in advance

so what is needed ?

1/2" studs and nuts with a 73.1mm or 70.6mm centre bore ?

also what thread type is needed and size for the actual inside of the actual hub ?

also is it a must to get hubcentric bolt on hubs , as in the lip in the centre ? i plan to run them on all 4

P.s the car is a garage queen has not been rego'd in the past 10 years , more of a trailer queen so i understand they are illegal

please help