I would have to believe that either seal would do the job. However, it is important to seat the seal so that the sealing lip is not pressing against a spot worn by the previous seal. Also, use a seal installation tool to seat the seal evenly and without having to bludgeon it into place. You can make a seal installation tool out of a piece of thick wall pvc fitting that is the same size as the outside diameter of the seal. use some long bolts that thread into the crank flywheel bolt holes and use a flat piece of steel to tighten nuts against to pull the seal in evenly. There is a steel tool that does the job, but it is fairly expensive. The threaded rod that I used was not the correct thread for the flywheel bolt holes, but I rethreaded them using a die. Good luck!
