Need Advice on offset 2009 370z w/SP 19" going down to 18" 4 temporary

4351vamp

I have a set of SSR GT 3 rims that I had on my Z32 way back when, With less than 3000 miles on them, kept them in storage for a while, looking to put them on my Z34 for only 7,000 miles till my wheels for life kicks in from white plains nissan. The policy Covers keys, batteries, and tires for life (Tire wear and tear is also covered for FREE!!!) But I am low a lil low on tread in the rear 4/32. My Z34 is currently at 20,500 miles, and this policy doesn't go into effect until 15,000 miles from the ,millage @ purchase (13,007miles) so have to wait till 28,007 miles then I get Free tires all around. I need a quick fix to hit 28K, this is what I have to work with, is it possible?

Doing this will save me $1500 on tire's!

front set are 245/40/zr18 93W 18x8.5 offset is +30 type C
rear set are 275/35/zr18 95W 18x10.5 offset is +43 Type F

Staggered look all meant for a 114.3/5 hub they come with KUHMO ecsta supra 712 tires both rims and tires have less than 3000 miles on them, just needed a little advice, thanks for any help!!!