I am looking at 8" wheels for my gt conversion .... what backspacing will fit nicely...or what is the correct amount??

I am running stock 911 15x8 on all four corners with 215x60 tires. I am not sure what the back spacing is though.

Josh the ones I got from you have been working perfect. with the slicks.
I have been using the Diamond wheels with 4.5" backspace in the rears and 5" backspace in the front. 15 x 8 wheels

225/50-15 Hankook RS2.

Not too much tire

get some longer wheel studs. that way, you can add spacers if needed ...
Andy

why 8;s all around? you can fit 9's no prob....

most fuchs have 112-120 mm of backspace (~4 3/4")

thats almost as far inboard as you can go.....

Iam running 15 x 8 Fuchs on all four corners w/225x50's on the street & same size tire with 15 x 8 Minilites on all 4 with track tires.

I would love a couple (2 or 4) of the 15 x 9 fuchs anyone got em and want to sell em cheap...??

I love that look but they are $$$$$