disc brake/wheel/tire setup

So here is my plan, let me know if you guys think it will work.

Going with CPP's stock front disc brake conversion (stock height):
http://www.classicperform.com/Store/...a/6874CBKS.htm

Going with American Racing Vector SE wheels:
15x7, 4" backspace, 5-4.75 circle (on all four)

I think I've got 215's on 14" wheels on the front and 225's on 14" wheels on the rear right now. I'm looking to keep stock width tires in the front...but how wide do you guys think I could fit in the rear? I'm not looking to do anything rediculous but do you think I could get away with 235's or 245's?

Anyone have American Racing Vector's on their Nova? Also curious to see what they look like on car...

Here is a "sticky thread" with info on your question. I have 255/60/15 on my car on 8" wide rims with 4.5" backset. They are close to the fender lips. The tires would fit better on 7" wide rims. Read the thread for more: http://stevesnovasite.com/forums/showthread.php?t=44121