727 build parts

Okay experience 727 owners. I'm getting ready to build up my 727 out of a 78 motorhome(hopefully it has the 4 gear planetary). This is going in my tube chassis duster. Looking to run high 9s. 4.56 Dana 60. Hughes solid roller cam. Leave on a brake. I know I want the bolt in sprag. Billet steel front drum (don't want to have to change fails all the time) and plan on using a tranzact low band brake. My question is what else will I need to make this transmission trouble free, and go rounds for years? Thanks in advanced