How much can you narrow rear axle with a mini tub kit?

[lancef53]

Working on a 73 Challenger, installing a level 3 USCT kit in prep for a gen 3 hemi swap. Currently planning on a 9" rear to replace the 7 1/4 in the car. With the couple inches of extra room per side, is it best to go with a 4" or so narrower axle? The plan is to use a 4 link/coil over setup in place of leaf springs. I haven't sourced wheels/tires yet, so I still have flexibility.
Thanks for any advice!

 

[Steve340]

It would pay to get the wheels/tyres and adjust the rear axle width to work with the wheels and suspension set up.

 

[6PKRTSE]

Yes, correct. I bought the wheels and tires first that I knew would fit in the mini tub that I did first on my blue 70 Challenger. Then we measured and cut with dimensions that I was able to figure out from the Strange Engineering axle flanges and rotor thicknesses. I don't recall how much I cut off each end, but it wasn't much since my Dana 60 axle originally started off as a narrower 1 ton dually axle.

 

[lancef53]

Thanks for the replies. Is the Dana 60 from a pickup the same center/tubes as what was in the cars?

I was just curious if people normally narrowed up the rears when they do the mini tub kit. I prefer the look with a little more dish on the outside, compared to the newer vehicle setups.