I believe that is this car:
http://www.turbobuick.com/forums/th...own-with-larger-factory-rims-whos-car.328488/
I really LOVE the idea but I DO NOT like the funneled look. It seems that the 1" or so spacer is too horizontal.
If you look at our rims the center portion is smaller than the lip. There is a slight resizing or reduction of the rim to compensate for this. The GBody reproduction aluminum rims DO NOT have resizing and the center section seems to be a little bigger, possibly around 15". Sooooo it would be possible to cut out the center reproduction aluminum centers (which are slightly larger) and put them in a rim shell similar to our stock ones and that would give a 16" no problem (and look 100% stock) and possibly a 17". Most people would be interested in a 17" version I would imagine. Another option is to cut the center and weld a 1" piece of circular metal and then put that in an upsized shell (check out post#40 in the link below). 17"s would be no problem but I would have to see the proportions of the wheel, it might not look right. There are also some rim companies that up size or make 2 piece wheels out of 1 piece stockers. Check these out (pure awesomeness):
http://www.stanceworks.com/forums/showthread.php?t=48941
Above company is located overseas, the below one is in Maryland but his upsized rims look kind of funneled. I am sure he could make the spacers more vertical.
ewheelworks.com
Absolute best part would be we could now have 17" aluminum wheels that would look 100% stock.