Tranny Shop in Las Vegas, NV?

My friend who owns a paint and body shop has a 64 A body that he is working on. He had a shop rebuild a 904 tranny and another shop install it. Now it won't go into reverse and each shop is blaming the other. So does anyone know of a good Mopar tranny shop is Vegas that he can go to?

Thanks for the help.

I'm definitely NOT touching that one !

With reverse being at the top it may be a cable adjustment issue

Thanks for the input. I will let him know what you said and see if that fixes the issue. I think I found a shop that is recommended by my local mechanic. We will see how that goes.

in thinking a bit further, could also be the pushbutton mechanism itself 🤔. both can checked by dropping the pan.
is the car drivable?

keep us posted as I'm curious