Jon D,
Your description is a little ambiguous...are you intending on replacing the BALL bearings with tapered ROLLER bearings?
I think the ball bearings would have to be replaced on 'application'...what year and model truck.
The swap to tapered roller bearings would include new cups and cones...bearings and races.
I think your best bet is to do a search in one of the forums. There have been numbers called out for these items, along with seals, but I don't think they are standard industry numbers.
Soneone who has done it will probably pop in and give us both the hot skinny.
I think your best bet, if you are intending on dumping the ball bearings and going with roller bearings would be one of the vendors that sell the complete package...seal and all!
Stuart
