Here’s a great example of what it takes to install a Mustang II crossmember in frames where the rails are too high, too thick, or just not nice to work with. Lloyd (who has a lot of history with us – you’ll see his picture in many of the Horton History blogs) did a really clean job on this install. You can see that if he left the frame rails at their original height, they would interfere with the upper control arm cross shaft bolts.