I just did 44a>44a on my 5.9 recently. Your brakes will swap over from your 35 to your 44a, so I would strongly suggest doing what you can to avoid having to bleed them. I left all of the lines attached still to avoid this. Just like anything else, hit everything with PB blaster as far as you can in advance as it will absolutley make your life easier. I would suggest changin your ebrake shoes as well as they are likely toast on the 44a and will be seized if it was sitting outside for any period of time.
Think Twice Garage
"I guess I'd just run it?"