Narrowed rear end measurements

[paulk68]

Originally Posted by slimjim

This cannot be stressed enough, always measure under your own car and I say this from experience, I had purchased my wheels but couldn't get underneath my car in its condition at the time, so the shop put them under another 68 also running the exact same suspension as mine whose rear end had already been narrowed to 52" WMS to WMS, well to cut a long story short, my frame rails sat wider than his and my rear end ended up having to be 54"... costly experience

great info guys.So what did you base your wheel backspacing on when ordering? Did you just look for a lip depth that you liked and go with that? it seems 5 - 5.5 is pretty common.