To answere your question BJ the stroker is able to run higher rpm's and if i build one by God i will use them.
as far as sealing the distributor on the stock system check out jegs or summit the usually have rubber boots that slip over the distributor.they may have what you are looking for.
Oh and BJ i made huge waves with my pick-em-up i hits water and really watery mud hard and fast <img src="/forums/images/graemlins/lol.gif" alt="" /> but that had hei from the factory .i added a sillycon bead on the inside of the cap and a boot for extra measures.i built that truck for offroading and wanted to cover all the bases.