@Stan Galat, as I mentioned in another thread, on my standard body CMC I run rear disks from AC Industries (So Cal). They are advertised as zero offset but did add a very small amount to the track. They milled this small amount from the hubs for me. The cost of these is probably in the same ballpark as EMPI.
I got my 4 lug wheels from Beck long ago and they have about a 5" backset. On thes
e 5.5" wheels, compared to a 4.5", the additional inch is all to the inside.
With 175/70 tires I can fit the tip of my little finger between the tire and fender.