Yes you will need longer studs if you use a 1/2' spacer.Some use this method with no problems and I did for a while too.But once I had a bad experience using that type of spacer.It shifted and sheered off 3 studs and I almost lost a wheel. :eek!: The 1/2" spacer will put the wheel out beyond the hub centric ring on the hub and the studs take the stress.
use the search
answer is yes they need spacers to get rim to around 4" back space , how much less than 4"bs becomes a matter of taste , yes they need longer studs unless you are using adapters with studs
most guys who insist on running the front and rear gtas use the rear gtas on the front with longer studs and spacers
you could run rears on rears but IMOH you shouldnt run spacers on the back unless you like chasing after your wheels
I run GTA front wheels on the rear of my T with a 1" spacer and the GTA rear wheels on the front of the car with a 1.25" spacer. The BS is perfect with no rubbing and the wheels don't have that weird tucked look in the rear. AFAIC, they sit in the wheelwells perfectly. Just my $.02 :cheers: