[Ol' Ron]

I assume this is a street rod? With that said them, the weight of the rear axle will determine the ride quality od the vehicle. A heavy 9" will ride somewhat like a pickup truck, so something like a Spicer/Dana 35 is all you need. Common in Jeeps which is quite narrow, however they were also found in some Jeep Grand Cherokees. Some of these have a triangulated rear suspension. I used a Jeep with wheel spacers.
Gramps