Grooving lifter bores

Those lifter bores are under oil pressure all the time, and if you prime the engine with the intake off, you will see a ton of "leakage" around all 16 lifters. Adding a grove to each one would put a lot more oil leakage in the system for sure. MOST of the actual lubrication of the cam lobes comes from the crankshaft slinging oil off the throws. I would imagine adding 16 additional leaks would effect the oil pressure much the same as worn out lifter bores. Just my opinion, and something to think about.