600 HP 468 Big Block
“Heads, valve train, and induction system installed”
Before bolting on the heads and valve train I needed to verify the valve to piston clearance. I placed small chunks of modelling clay in the valve reliefs.
The head gaskets were installed and the heads bolted in place
The rocker arms, lifters, and push rods were installed (Note: because the push rod length was not known at this time I used two adjustable push rods) The engine was rotated two full cycles, the heads were removed, and the clay was inspected.
Piston to valve clearance on the intake (.220″) and exhaust (.200″). More than enough for our application
The valve train geometry and push rod length was verified. I marked the valve tip with a sharpie pen, install the valve train and rotated the engine one full cycle. This process was repeated until I got the witness marks in the middle of the valve tip.
The push rods lengths ended up at (7.650″ and 8.650″) and a set of Manley push rods were ordered
The heads were bolted on, the Isky hydraulic roller lifters, Manley push rods, and Crane rocker arms were installed.
The build was finished off with the installation of an Edelbrock Performer RPM Air-Gap intake manifold, Speed Demon 850 CFM double pumper carburetor, and MSD billet distributor