With our '69 Mustang project car, we did the latter in a how-to story in our Nov. '05 issue. There, we installed Control Freak upper and lower control arms, which are made by Blue Moon Motorsports ...

The control arms (PN upper 6467ECU-K, lower 6872ECU-K) showed up painted and ready to go, right out of the box, so we didn't have to waste any time before installing them.

Most of the lower control-arm part numbers shown will fit all '64-72 Chevelles. Note that upper control arm numbers for '64-67 differ from '68-72 Chevelles. Ditto for any listed frame braces.

There are two upper and two lower ball joints. Typically, the lower ball joints are the most likely to need replacement, since they carry the majority of the weight of the truck.

1963-72 C10 control arms use a metal-to-metal bushing on the upper and lower control arm X-shafts. 1973-87 C10 control arms utilize a traditional control arm bushing, which will absorb more vibration.

Yes, the Ram 1500's upper control arms have plastic in them. But does this make them as weak as a milkshake's straw? And what do control arms do, anyway?