In my head I thought this was a great idea... Now I need to make it happen.

http://www.flickr.com/photos/8460891@N02/5583304230/
http://www.flickr.com/photos/8460891@N02/5582718789/
I need help devising a plan for my 04 Sedan 6mt. Does this seem logical -

1. Install Suspension, I have Z revised shock/springs (If this looks ridiculous with the wheels I'll save up for coilovers).

On stock suspension I have 10mm clearence on the inside of the wheel.

http://www.flickr.com/photos/8460891@N02/5583303502/
2. Mount tires on 18x9 +30 wheels. I have a set of 245/40/18 reo50a's, but I dont want to waste that rubber dialing everything in. Should I mount some spare sportcontact 2's 225/40/18's while I dial everything in. Is that a terrible idea?

3. Install wheels and get an alignment. From what I've read I should still be in spec. Would it still be a good idea to get a rear spc toe bolt and rear camber arms. Then if I go coilover's, front upper control arms.

At this point am I wrong to think that on 350z suspension I'd need more than a fender roll?

Thanks in advance for the help, I've been lurking/searching for quite a while so go gentle. Or don't as long as it's funny.