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you are correct highly recommend hub-Centric adapters Only.
you must figure the dimensions you need for your individual wheel and offset.
in general you need about 2 in the front, and 2.5" in the rear.
again all this depends upon the specific wheels you choose, if your buying new,
get the correct fitting wheels so no adapter is required.
here is link to a concentric 2" adapter on ebay. http://www.ebay.com/itm/151974323188...%3AMEBIDX%3AIT
these are 17" using 2" in front, and 2.25 " in the rear concentric adapters.
I wouldn't call these hubcentric if they don't help locate the wheel to the hub. Mine have a 1/2" protrusion that fits snugly inside the wheel bore to center the wheel to the hub. 3.07" diameter in the case of my particular wheels. The inner bore to fit the Chevy hub should be 2.78".
I used 3/8" on the front and 1/4" thick on the rears to get the right fit. You'll need to use long reach lug nuts unless you want to install longer wheel lugs. If you want to use longer lugs to add up to an inch, I would recommend Milodon 86050. All these longer lugs will require reaming the bores due to thicker knurl diameter, and the Milodons only add .005" additional knurl diameter. Fronts are easy to fit, rears are more complicated to get in and out.
(Stock studs are 1.75" long with .475" knurl diameter. Milodon 86050 are 2.625" long with .480" knurl.)
For the OP, have you received your new wheels yet? And can you measure the backspacing? I'm assuming you just need 1/2" or less changes to your desired wheel's position. If you're using newer C5 style wheels you'll need a 2" thick adapter and that's a whole different discussion.
