I always preferred the Safariland carriers that wrapped around the belt and the speed loader road on top of the belt, with rounds on both sides of it. I think they called them something like the "Split Six", etc.
They look like this....
Ive used a few other types, but the ones above worked the best.
Im not sure they even make them anymore, and I dont know if the larger loaders will fit in them. I have J and K frame versions of them. I do have a S&W L frame 7 shooter, Ill have to dig one out and try.
More I think about it, the 8 shooters are N frames, arent they? Probably a moot point.
One type Id stay away from, are the spring steel clip type carriers. I tried them for a short while, and between the loaders falling out, and sliced bloody fingers from trying to grab them out of the carrier in a hurry in practice, I ditched them pretty quick.