have i bitten off more then i can chew

[bishoprado 0]

ive just got hold of some porsche 7 slots for my rado, at the mo the rado is standard.

 

right the wheels are

 

Fronts: 8inch wide

backs: 9inch wide

 

now the fronts arnt a major problem, its the backs im worried about, ill have to use 20mm wheel adaptors too. what problems am i gunna be lukin at when fitting these bad boys?

[ben16v 0]

have a read of this should help