Projects Model A body mounting

How are yall mounting you body (Model A Sedan) when it is just a shell? I have frame rails that it sits on for the sides but I don't want the back end flopping around. Should you just weld a piece of angle iron from the frame to the body once you get the ride height determined? Any photos of how you did yours would be appreciated.

 

You need to buy or make subrails or a subframe to tie it all together.