what size harmonic bal. does a 283 have?

I need to buy a new harmonic balancer for a 1964 chevy 283 build, I don't know if they are they same for all small blocks or not. A couple of people said they are different. I need to know what size to buy.

 

The small one 6 1/4" or 6".

 

yes , about 6" diameter...and it looks like this:

 

thanks guys, Do you know where to get one new?

 

Jeg's, Summit.

 

those aren't really a harmonic balancer though are they? Always thought the ones on the 283's were just lower pully mounts?

 

Harmonic dampener as I remember it. They were not a solid pully mount.