Willys 4-63 Electrical, Lighting and Wiring Parts

There is a lot to consider when choosing the proper spark plug for your engine's intended application and power level. Let us take some of the guesswork out with our spark plug buyer's guide.

Check out this headlight wiring and taillight wiring diagram.

This project consists of using welding cable to relocate a battery to the trunk of a 1967 Chevelle. Learn the benefits of using welding cable over normal battery cable and how line clamps are used to secure the wire to the frame rail.

Why convert to an LED-style headlight or taillight system? Click here to find out how to do it the easy way!

Follow along as Jeff installs an early 700R4 transmission for the big block in his 1967 Chevelle. See how this unit is upgraded and converted to a later 30 spline style.

Are your gauges reading erratically or does your car run out of power at high rpm? It may be the cause of a bad ground. Speedway Motors can show you how to diagnose and fix the problem in no time at all!

A real-world guide to 4L60 transmission specs, strength, and swap tips.

Do you have a project that will require you to build your own 4-link bars? Here's a demonstration on how to determine the bar length, weld the parts and assemble the links using steel tube ends weld bungs and forged 4-bar rod ends.