I am not sure what you are looking for, but I can answer part of your question. All of the wheel blanks that are used to make up the smooties will allow you to run disks. The inside of the wheel is contoured differently than the original wheels.
At the time I bought mine, there were sizes available up to 17 inch. The wheel builder did tell me that the 17 inch wheel was real heavy.
There are a variaty of hub caps that fit these wheels; some classic styles, but most more modern. The original hub caps can be addapted with a weld on ring that will fit the smooties.
I went with 6x16 for the front with the stock back space and 7x16 with 4 3/8 back space. The back space for the rear should have been 4 or 4 1/8 inches; the wheel would have centered in the fender better. I will probably run a spacer to correct this. I went with 16 inch wheel because of the wide variety of tires available. I like wide with lots of side wall. So I will probably end up with a 265/70-16 in the rear. I am not sure about the front yet.
If you are installing a IFS you will want to go with a 5 lug pattern.
Here is the posts related to rear axles.
http://www.chevytrucks.org/tech/ifs&rearend.htm You can look at my build pictures; there are couple of pictures of the rear end at what I hope will be the ride height. The tire is a 255/70-16.
