Well folks. Simply. You guys have saved my ass more than once and I'm grateful! First time was with my 75 Highboy. I did a 76 disc brake Dana 44 Diff Swap. Couldn't find anything for it. No locker gaskets, no seals for the actuator knobs etc. You had what I needed to complete that project and I'm still happy with it. I guess 76-77-1/2 being a short production run caused alot of the problems however I'm thrilled about the unit. there's not much you can do with a closed knuckle as far as disk upgrades and this unit is perfect for what I wanted. Hey. It stops without all 4 wheels locking up I'd say that's a major improvement! This other order was for my wife's 68 F250. I wasn't aware of the 4X2 designation until I started looking to you folks to help me out again. Nor was I aware that the housing nuts were 2-3/8". Literally everyone everywhere was saying 2-1/2 even on the fordification website. Someone had Literally beat the hell out of those nuts with a chisel and reinstalled them without folding the lock tabs over. Yeah... I'm rebuilding the brake system and tore it down to bare housing including pulling the backing plates for cleaning and prep. That's when I discovered that there's springs behind the Bendix levers which by the way. No one has them! Nobody but you guys. Which is odd as hardware kits seem to be prolific except when it comes to that particular thing. So as I stated. You saved my ass Again! I do appreciate the scope of your knowledge, and your willingness to be helpful on educating those of us that are unfamiliar with some of the oddities,and on half year production changes. The information really is priceless! Thank you all again! Regards. Frank Adams.