340 Harmonic Balancer Recomendation

Just about any of the aftermarket balancers will work for what you want. I shop around & find one that works for an externally balanced small block. In my opinion, I'd stay away from the Chinese made balancers.
Hard to tell whats made where. Nearly everything is made over seas especially this type of stuff. I have looked at Summit and Jegs and its rather limited. I am surprised. Lots of SBC though......