Little out of my budget, but thanks. Considering Howard's or Crower. Really don't think it's lifters. I can use an oil can and pump oil through them so they aren't plugged. Not going to disassemble new lifters to look inside just yet.For flat tappet lifters, we use Precision Products from Arden NC. Will cost you around $500/set, worth the money if your doing something more than a street engine.