Rebuilt 318 install problem

Honestly that means nothing. Unless you verify that true piston TDC is being displayed as 0° on your particular balancer/cover, you are 100% guessing. If I was in your position, I would verify with a piston stop.

When I line up TDC the timing mark lines up from the balancer to the tab. I understand that I'm not using a piston stop but it lines up which I think means the balancer is fine. I don't think it's a 100% guess. Most use the same practice for finding TDC for the #1 piston as I have and don't have a problem. I've done this same procedure and it has always worked ..... until now. Wouldn't I be at least the neighborhood even without the piston stop?