hydraulic roller lifters issues

Do not try different base circle on one lobe, if a grinder agrees to do it, run like hell. You didnt mention what engine this is in, guessing 340 or 360 as these seem to be the blocks that have that issue worse than any others. I would have the bores sleeved as that is the correct way to fix. Lots of threads of people swapping lifters between brands but not sure that ever really fixes anything. This is the reason we use the Magnum block, eliminates lots of issues. Too late for that but dont do a cheap fix as it will bite you late down the road.