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Don't give up on it. Hone the inside till you get a snug fit. Then see if the pulley's line up.

Some aftermarket balancer's are way to tight. They need honing to get a tight but not impossible fit. Fluid Damper brand are way to tight out of the box.

More than likely by you loosening the shafts the plunger in the lifters have pumped up. If you let it run rough after tightening for a little it should smooth out. Repeat this step until they are tight. Unless this is a new build and the parts combination is in question.