gotgcoalman wrote:What of oil are you using?
I do not think that the grade of oil is so important.
The probable cause of oil leakage along the shaft is the wear of the seal.
To replace the stuffing box, remove the timing belt, remove the camshaft sprocket, remove the intermediate sleeve from the camshaft and remove the oil seal from the socket.
In my opinion, the best stuffing box is Teflon.
Lubricate the oil seal from the outside and install into the socket.
Inspect the bushing, if there are signs of wear on it, then replace the bushing.
You can install the stuffing box to a different depth.
Replace the rubber seal on the bushing.
Install the bushing in place.
Install the pulley and timing belt.