If you have to take it apart and start again be sure (really certain) the clearance between piston and cylinder is spot-on correct and also that the cylinders are round with no taper. I'm not a fan of break-in oil. As long as you're using an oil that's good for a flat tappet camshaft (like VR-1 30 weight for example) I feel you'll be fine. I know some folks are real fans of this or that oil...and that's fine but I'm just not in that crowd. And get it honed properly for the rings you'll be using. All this is important. I expect you've got some glazing now. As somebody else said get away from any synthetic oil. Good luck!
