Yes, all you need the 1969 and before crank seal, but don't forget to plug the 3 little level holes to the right of the seal, those holes go right into the crank case.
One easy way to plug those holes is to use the same 3 little rivets that hold the Triumph patent badge on the cam cover.
MAP cycle has a real neat vent kit for the crank pin timing plug behind the cylinders that comes with the thread in fitting all the hose and a PCV valve that allows presure out and keeps vacuum in, it really makes the engine a lot more leak resistant.
Hey Tony- I was researching this earlier today using the search function on here and came across another thread where you mentioned the kit from MAP. I checked out their on line catalog, but couldn't find anything. Happen to know a part number? THANKS!