Sure, I don't think it matters whether you use AC or DC, the coupler mounting height is all that counts; as long as everything lines up, you should be good to go.
You're right, those with the plastic "cat's whiskers" type of springs are pretty useless after being stored. The Walthers couplers I just got have the same separate brass spring like the KD 5's, (and that's a good thing) but I still find them a shade on the "small" side for my eyes...
Mark in Oregon