This early gallery style cylinder head uses extra long cylinder head studs along the manifold side of the engine.  These studs pass right through the inlet gallery so a secondary copper sealing washer was incorporated in the original design to prevent possible air fuel leakage around the studs. All new washers  and nuts have been used here.

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A rear main seal kit into the rear of the engine was also installed. The seal housing can be seen just ahead of the crankshaft flange.

The engine was fully rebuilt to standard specifications but a bit more cam lift and duration were added. The bores cleaned up nicely to +.030” and the piston, rod and cap assemblies were statically balanced to match each other and the big ends were carefully sized for perfect diameter.

An interesting note regarding the earlier engine mounting to the cylinder block: Note the diagonally elongated holes so the mount can be adjusted to allow for the angle set of the engine in the chassis. In this earlier style the mounting is identical for left and right. On later cars, these were simply round holes but the mounting was drilled for left and right angle inclination and stamped LH and RH respectively.

100-Six

Restoration - Engine

The crankshaft was turned to  .010” undersize on both main and connecting rod  journals. Everything that spins with the crankshaft was dynamically balanced for smooth long life.