4R100 tolerances and specs

[early99powerstroke]

I'm looking into adding more clutches (oem spec borgwarner clutches) to my clutch packs to my 4R100. Does anyone know what I should machine (tolerances) my drums, steels, and pressure plates to add more clutches?

 

[powerstrokenstang]

Dont know the specs but they only turned down my drums to make em fit but it was a racerx kit so the plates may have already been thinner not positive.

 

[907DAVE]

I had to machine a couple of my backing plates down a touch to get clearances within spec's, but it wasn't much. IIRC the added frictions went into the direct and coast drums.