Ignition - HEI

To unleash those hidden horses hiding in your GM H.E.I. distributor, consider installing an ignition re-curve kit.  A simple change of the centrifugal advance weights and springs can make an unbelievable difference.  

The kit can be purchased from your local auto parts store and can be installed in about half an hour.  All you require are a few basic hand tools and a timing light to install the kit.  

The weights are located immediately under the rotor. Even without changing the rotor, plugs, or plug wires it makes a dramatic difference.  For $10.00 to $15.00 it is pretty cheap horsepower.