77 front valance question

[thejobrien]

Quick, newbie question I have about the front valance on my 77. Are there any differences between non-turbo and turbo front fender flares? As far as I can see from looking it up, front fenders stayed the same up until the 80s? Reason being I'm wondering if this valance from AIR would fit on my car. (picture here). It still has the bumperettes, but being a slant nose, I'm assuming the front nose is wider than a stock 77 911? I think it said it was for 9" flares - which I assume are different than the stock fenders. Just cant find any info on it. Also seen similar valances from GT Racing - mainly just curious. Otherwise, stock looks just fine to me unless someone can point me in the right direction for a different front valance similar to this. Im considering running a center oil cooler which is the reason im looking at these.
link for more:
Thanks,
J