Need help fitting 20'' VE HSV GTS rims to my VT SS

[VT5.7L]

Hey there, not sure if this has already been posted had a look and couldnt find anything to help but,
i bought a set of 20'' ve hsv rims, and having trouble fitting it.

i know you have to get them machined, but the rim is scrapping on the strut, im thinking simple fix would be spacers and longer wheel nut studs perhaps, but anyone have any other ideas?

also i have air bag suspension on the rear of the car, should i get it tubbed/roll the guards?

any help is muchly appretiated =]

[DevilDRake]

Rolling the guards is going to be a must, you get them machined for around $40 a wheel, and the rim or the tyre is hitting the strut? If it's the tyre you'll need a lower profile (as VE's run 5 higher profile, so instead of 225/40 you'd need 225/35 for example).