wheel help

[jconde]

I found these wheels that i like but i'm not good at converting mm to inches.Now i know that with enough work anything is possible because i'm willing to shorten my rearend, I'm already moving the leaf springs in and i have already mini-tubed my 68 mustang coupe but will these work on my car.I know the lug pattern is a chevy 5 lug but they do have 114.3 with the same offset front and rear thanks
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[mc84_zz4]

Here is a great wheel calculator I have used for Backsapcing to offset calculations... HTH
http://www.rimsntires.com/rt_specs.jsp?item=Wheel-Tire%20size%20comparer&showRim1=1&showTire1=1&sw1=245&ar1=50&bd1=16&rd1=16&rw1=8.0&et1=-10&showRim2=1&showTire2=1&sw2=255&ar2=40&bd2=18&rd2=18&rw2=8.5&et2=56&text1=Current&text2=Z06%20setup