64 Dart centerlink

I have a centerlink from a 64 Dart roller that I was told was an original 273 car. The centerlink that I took off has a "drop" in it for oil pan cleanance but it doesn't look like it would be enough, but some other ones that I've seen from /6 cars was almost straight with hardly any "drop" in it. From the pic, can anyone tell what this centerlink is from? /6 or V8. My thinking is /6, but the firewall has the V8 distributor "dimple" in it as seen in the second pic so can this in fact be a V8 car with the V8 centerlink?

Thanks everyone for any help.

Ken
Edison, NJ