540,
I sent you a PM about a 12 bolt.

mini tub dif
 

If you find a rear end you can narrow or widen to fit you application.
When doing a mini tub I recommend picking a rim with a standard back space then fit the rear. Depending on the company it could run up to a $1000 for a custom back space thats even if it can be done.

I just finished installing the complete DSE mini tub kit on my 69 Camaro. It was one of my first fabricating experiences. It was not tooooo difficult - just time consuming. I also just go in my new Moser 12 bolt rear end for the car. I have 18x12 Budnik rims for the rear with 5.5bs and I ordered the rearend 55 1/4 wheel to wheel and it fit perfect!

How much did that new Moser run you?

Any one know much it cost to get the kit installed.

Scott hit the nail on the head with this answer!
Kevin

sorry if this is a stupid question, but is it really necessary to narrow the rear end? why cant you just run a wider rim with correct backspace?

It's not necessary, but IMO less backspacing is more desirable to look at. I'm running 18x12's with 6" oF BS.

You can - it's just that lots of people like to run wheels with the smallest backspace possible so as to create a deep wheel lip for visual effect.

ah ok, thats what i thought. just wasnt really sure since so many poeple get their rear ends narrowed.