A big thank-you to Specialty Products, Longmont, Colo., for photos 1, 3 and 10-20; and to Dave Phlueger for photos 2, 4 and 5-9.

When lowering or altering the suspension on GM vehicles such as the A-body El Camino, the first and second-generation Camaro, F-1 and F-2 GMG-body, some B-bodies and the Tri-five Chevrolet, you can easily run into control-arm-interference or strikeout problems. There are solutions to this problem and there are ways to lower these vehicles and maintain correct steering geometry. Please notice and study the illustration in the Figure 1. It shows some basic geometry angles. If you imagine the control arms in place and what happens when you lower the vehicle, you can see how easily you can kick camber, caster, toe, scrub, steering-axis inclination and just about every other angle imaginable on a suspension system off, if you don’t do the job right.

Some of the control arms shown in this issue of Photo Tech are production while others are prototypes soon to be released to the aftermarket. The point is that there are special control arms, springs and other suspension parts that can enable a lowered GM A-body, Generation 1 or 2 Camaro, G-bodies, Tri Fives and other vehicles, including many Ford products, to be lowered correctly while maintaining overall steering geometry. The old days of torching a spring to lower a car are gone. The method was never smart and never created a safe vehicle. Modern technology has solved many of the problems that were associated with lowering these vehicles such as suspension bind and handling issues. Buy the parts to do the job right. You will create a safe-handling vehicle that will be predictable in all aspects of your driving.