wheel purchase need help!

[mjf7552]

i have very recently purchased a 260z 2+2 1978 standard. i have already purchased new front bumper and flares for arches from MJP eastern auto. if there is anyone that has already done similiar you help would be greatly appreciated. i want to add wheels as big as possible but dont want them rubbing on anything. i would imagine i will need to upgrade the suspension and roll the arches, or will i ! iam looking at rota wheels think there called rbx's need sizes offset etc.this is my first datsun been wanting one for a long time and cant wait to get started. Also looking to :

obtain spoiler.
re trim
new carpet

any help greatly appreciated!

 

[riske]

im guessing you havent looked at the rare rims website otherwise it would have told you the offsets etc.
Im new to datsuns so not sure the flush fitment on a Z yet. Basically go for the widest J and lowest et and make it fit