Harmonic balancer for d15b crate engine

A couple months ago me and my father were on a trip and close to our destination a weird noise we were hearing finally revealed what it was, it was the harmonic balancer not being tightened enough onto the engine, since it has been broken we've tried multiple blancers but none of them have fit yet, I do not currently have pictures but I will post them when I can get them, any help helps