I have a '81 Crane catalog, that lists a Blazer 304-2F.
304/314, 238/248 @ .050, 114 LSA, .563/.586 gross lift, .026/.026 lash.
Says it operating range is 3k - 6.5k. Sounds like a good early cam (split wise) but, 81° of overlap and 86° ICL. I'd advance it 6 - 7°, for 79° ICL. Even at 79° ICL, it can take 11/1 CR