Time: 2 hours
Tools: standard wrench set, flat-blade and/or Phillips screwdriver, wire strippers/crimpers
Cost: varies by manufacturer- approximately $175-$400
Tinware: HEI distributor (new, rebuilt, or used), HEI ignition lead connector, HEI style plug wires
Tip: Label or mark the location of your spark plug wires on the distributor cap for fast, easy reference.
Tip: When you have installed your HEI distributor, its best to widen the plug gap as well.
Tip: You should run a new power wire that is getting a full 12 volts. Simply splicing into the existing lead is not getting maximum power to the ignition, as that is a resistance wire. If you measure the juice at idle on that wire, you will find it to be only around 9 volts. The car will run and operate using this wire under normal driving conditions, but the power loss will be noticeable at full throttle.
Performance gains: increased coil saturation, higher spark output, more reliable performance
Late Chevy Technical Features
Time: 2 hours
This 1969 Chevelle Malibu has certainly seen better days. With the 350 cube, 2-bbl. V8, this car originally came with a single exhaust system. Passable (but just barely) performance wasn’t good enough, so we elected to install a full dual exhaust system. This would not only help the engine breath easier, it would give us a nice, mellow muscle car sound.