1965 273 4 groove crank pulley questions

halfafish said
I have this one, is there a number I can check, or do you need measurements to see if it's the right one?

View attachment 1716084204

View attachment 1716084205

That looks like a later model pulley. No integrated rubber balancer thingy, and there are 2 pairs of identical grooves. But thanks to another member I have found the parts I was looking for.