Not to be blasphemous but you might check out the Fordbarn street rodder site. Every single chassis offered by TCI, Pete & Jakes, Progressive, etc. has the cross steering for cars of the 30's and 40's. The Vega box is good for lighter cars and the Saginaw 525 for heavier ones. Both are small and mount the same. Since these guys use this set up on nearly all their straight axle rides they would be a good source.
