Rob, if you're looking for a
hub width of 59.75" then we can get pretty close to that with our 33" crossmember. That would yield you 29" inside and a hub width of 60". I had a 65 Rambler 330 wagon until a couple months ago. IIRC I had measured out that a 30" outside width crossmember with 57" hub width was the best fit for the wheels I was going to use. Track width is more dependent on wheel offset.
A $1000 difference may sound like a lot, but in the scale of a whole car build it's the place where $1000 can make the biggest difference.
Our Street Machine Crossmember is available in 15 different widths with racks to match so if you need to go narrower that's easy too. It uses all new components engineered and manufactured in our California factory. It's neither the most nor least expensive crossmember out there but it's the only 'universal' system using proprietary geometry and components instead of Mustang II spindles and their variations.
You can get a PDF overview of the system
HERE and see details on individual components
HERE.
Here's one that was installed in a Maverick by Auto Edit.
And here's one that's currently being installed in a Rolls Royce by Fesler Built. (Yes, it's right hand drive.)