I've got the late pickup steering box conversion on my 1950 truck. There are some pictures of it installed on this page
http://millpower-race-engineering.piczo.com/?g=37945531&cr=5 I bought the complete setup from CPP and found it was a simple job to fit. There's plenty of clearance for the left roadwheel on right turns even after I shortened the supplied steering arm that fits to the spindle to give a tighter turning circle -the roads are smaller in the UK than the Tarmac wide open spaces you guys have!
Good luck with your truck, Stuart.