Question about Lifter Oil Gallery Plugs

Yes if you drive the galley plug in to far it will restrict or block off oil flow to # 1 main. I have pulled apart several LA engines and some had the plugs and others did not. I always put them in just to be on the safe side. Measure the depth of the # 1 main feed passage from the front face of the block, make sure your plug is a little shy of that measurement , trim if needed on a belt sander ant drive her in flush w the face. That easy, No worries.