Hardened Locks, 351/400M
Half Four Groove, Half Single Groove to suit 341/400M
There the years of this series engines life, Ford 351/400M used two valve lock variations. Early engines used all four groove valves/locks while later used half four groove and half single.
If you're going through a late 351M or 400M engine and want replace the locks, this would be the correct choice.
All 351/400M engines used 11/32" Valves
Includes:
Alex's Parts- The smart choice in valve train parts~