1972 chevelle wheel questions...please take a look

[DanCheet]

hows it goin? i'm new to the forum, but heres a little info about my car.

350ci chevy
- 274 duration cam
- ceramic headders
- 2.02 heads (i ported and polished them) with new springs and stainless valves.
-holley air-gap intake
-750 cfm carb.

3.73 gears, posi, 4 speed muncie M-20 with a steel mid-plate and other goodies......

nothin too fancy cause i'm workin to pay off any car mods...it runs a 13.65 in the quarter, again not the fastest car ever but not to bad for a 4100lb fat chick...

so heres the question, i'm lookin to get some wheels and tires and i'm stuck between polished Z06 wheels and polished Salt Flat Specials. I'm wondering what you guys think and whether or not these deals on eBay are legit...

http://cgi.ebay.com/ebaymotors/ws/eB...948151809&rd=1

http://cgi.ebay.com/ebaymotors/ws/eB...948278938&rd=1

i know i should run about 4 3/4"-5" of backspacing, does anyone know the offset of the Z06 wheels, it says 56mm but that seems a little goofy. thanks again for reading this and any help would be appreciated.