Chevy BBC 454 Rear Seal Adpater Gen V &VI Block 1PC to 2PC Rear Main Seal you will need one of

you will need one of these tach adapters

easily outperforming stock ignitions

All the factory flaws redesigned to be eliminated

Each Speedmaster hydraulic roller camshaft is manufactured to the highest quality standards

Tune your rpm-activated control to your application with one of these Speedmaster rpm module kits

Chevy BBC 454 Rear Seal Adpater Gen V &VI Block 1PC to 2PC Rear Main Seal you will need one ofThese Speedmaster rear main seal adapter kits are designed to install an early 2 piece style crankshaft into a late model, 1 piece engine block. They are manufactured from billet aluminum and require no drilling or welding for installation.