This is where there might possibly be the issue. The 606-16 part number consists of 8 pairs of Comp #604, 7* 4-groove locks (for the exhaust valves) and 8 pairs of Comp #602, 7* 2-groove locks (for the intake valves). The 604s seem fine. I'm thinking either they included 8 pairs of locks different than 602s, or the 602s are just **** and don't fit correctly. We'll see what Comp says tomorrow when I call. I appreciate the help! I'm just glad my dad noticed since he's building the engine at his place.
