What kit(s) to buy for a mild 904 rebuild?

Well if he insists on a 904 at least get the drums that allow for the most # of clutches within each, the bullet accumulator and servo, and a mild shift kit. Many don't know that there were variations within a "904" vs a different one. Like his /6 one may only have 3 clutches within the drums while some have 5.
Don't remember if there's different # of pinions in the planetarys like on a 727 but if he can pick n choose go with those versions that have the most... As far as which overhaul kit whether WIT or Transtar ( is dacco still an option? I think they became Transtar) I don't think there's much different unless he goes like kolene steels and the "red" clutches but I don't think he'll have to go there

Sorry even the mildest meekest daily driver I haven't had much luck from 904s...