The first job was to select a prepped block and remove the main caps which were probably there for line-boring purposes.

After the crank and rods have been installed then the main caps are re-installed and tightened.

After the rotating assembly has been dropped into the block it is bolted to an engine stand and final assembly begins.  The rods, crank and piston had already been installed by a Chevy COPO specialist.

Boxes of rods and pistons assembled and ready for installation in a COPO 427.

As you can see in the photo of Curtis finishing up the timing chain installation the COPO block has cross-bolted main caps for added strength and durability.

Once the main caps have been installed and properly torqued and checked they install the “windage tray” to help with oiling.