What are you using on bolts to hold the stuffer in... red/blue thread sealer....anti seize/ silicone?
Stuffing box is on a flat, packings on the shaft is what your talking about. What th OP is asking about is a stuffer. A plate bolted to the bowl to get rid of the void on the exit side of the bowl.the stuffing box should drip under power about 10-20 drops a minute.just enough to keep the packing rings cool. you won't want a weep hole, the stuffing box leaking is the only way to cool the ring and shaft clearance. when you put the gland in it may be a one or two piece gland, run it in to seat the packing then back it off to hand tight, run it in 1/2 turn at a time till it just drips out like i said, the pressure from the pump pushing on the packing will be enough to keep the bolts from backing off.