Ask KB if they have any feedback. My guess is that you wouldn't need bushings since you have drilled oil galleries. So the lifters are going to be flooded with oil whenever the engine has oil pressure. I suppose it might depend on how big the valve springs are. If you run an Accusump the engine will have oil pressure during cranking so the lifters will always be operating on an oil film.
Andy I will be running an accusump for prelube and a little safety cushion. When I last talked to Tim Banning. At that time he said it is personal preference. If unbushed run a .060 restrictor at the rear of block in each lifter galley. He said if running bushings put a .023 to .025 oil hole in each bushing if lifters have pressurized oiling. Valve spring open pressure in the 650lb. range. It is a street engine so looking for best option for its intended use. I always appreciate the input on this site. Galen
