I'm assuming you have a 14 bolt 8 lug rearend under your suburban. To narrow it up, you have a couple choices. First, you could use hubs from a dually truck. They'll put your wheels pretty much in the same spot as the original rearend.
Secondly, you can use Eaton style hubs. You'll have to change out the bearings, due to the fact the Eaton hubs have a larger spindle shaft. With the Eaton hubs, you'll have a 64-65" WMS whereas the dually hubs and the original rearend were 62-63"
With both methods, you'll have to retrofit your brakes for a narrower drum. Late 80's/90's vans have a narrower drum that may fit the bill.
Chris
A good Tech Tip
