average narrowed 8.75 length

The way we always set up for rear end placement i nthe willys hot rods was to place the wheels/tires in place under the wheelwells,exactly were they go,front to rear,side to side,etc,proper ride height.Then is a simple measure ment from wheel to wheel.At that point,you call moser engineering with your measurements,and they will tell you housing length,axel length,etc.good luck! ps.I found a much cheaper billet master cylinder,thats looks as good as the last one i showed you.its $119.00,and would look awsome in a shiny black engine compartment.the company is www.yearwood.com they sale street rod,and hot rod parts and accesories.they also have the polished billet aluminum hose and line clamps for the fuel and brake hoses!See ya!