I have a 66 Mustang with a 200ci 6 cyl. The harmonic balancer went out and I stumbled over something that made me a little confused. I have a 2-groove balancer and I found out that there are no reproduction 2-groove balancer/damper assy. I only use one of the grooves. The front one has no belt on it and isn't being used. If I got a 1-groove balancer, would I run into any major problems?

haha wow I've been looking everywhere for that! I was told by three different people that they didn't make reproduction! I havent found repro and these are probably rebuilt so I guess they were right but still, thank you very much haha!