pondfanatic, it appears that you are looking ahead with some clarity.
I have no experience with FHMs and can't answer your question about numbers per pound, but from what I have gained from reading lots of posts here, two things stand out to me:
1. FHM without predation will multiply nearly exponentially, so one doesn't need to "overstock" them. I don't recall the recommended number of pounds per acre of pond. You may be OK at 10 to 20 pounds per 3/4 acre. Or, that may be many more minnows than you need.
And, more importantly:
2. It seems universally recommended on this forum to look at each and every minnow that you stock so that you are SURE no unwanted fish are introduced, such as LMB or BH or BCP or something else that will monkey wrench your plans for the pond. I know I'd be sick and tired of FHMs if I had to ID 10 pounds of them!
