I can't comment (or don't dare to) re: stand dev as my luck with it has been, at best, mediocre. As for D-76, it is not going to give you grain. Even if you dilute it 1+3, it will not give you "really" grainy negs. I would also go with Rodinal, perhaps even more concentrated than 1+25.
Another option is to shoot T-Max 3200 or Delta 3200 and soup in Rodinal.
Or, shoot 3200 with a wide angle lens, soup in Rodinal and then enlarge the image way up. That ought to do it!