Well 1Longbow, I would go with the #1"A" for as I recall, they were a bit shorter then the "B".
Now, without looking at my old RUGER catalog, I could end up wrong, I think that would still be my direction.
Over the years, I've had mostly #1 "B", but once I had a #1 with the Alexander Henry forend AND cured that ugly groove with a nice piece of contrasting walnut or ebony, I really like that slender forend!!!!!!!! way better then the beavertail of the "B" model.
Now I wouldn't turn down a #1 in most any style, but IF I HAD A CHOICE ------------------------
Keep em coming!
CDOC