Hey Grigg,
Minor correction to one of your replies. The 2007 and newer IFS units have the standard 10-bolt pattern. Earlier units have the larger bolt pattern. There might be some 2006 model IFS's that have the standard bolt pattern, but I can't be absolutely sure.
Also, the info I am sending you will give you lots of good data, but it might be worth your effort to try to crawl under Bill Marlow's RV. Nothing beats seeing the IFS in person to get a feel for how massive it is.
Seth K. Pyle
