in this case it would be the opposite, the back wouldnt be stretched it would buldge ever so slightly and the front would be normal so i figure i need the front to buldge slightly to make it look right
Different tyre makes stretch differently as well I don't know what manufacturer you're planning on running but it varies quite a bit. The Falkens on the Blitz wheels sat on my S13 were pretty stretched when they had a 215/40 on an 8J, but another manufacturer might look a little more square. A friend of mine is running 205 Maxxis (I think!) on an 8J on his 323 and they don't look particularly stretched... the 215 Falkens looked MUCH more stretched than they do