Last year, Tone Box released a uniquely menacing overdrive unit shaped like a human skull where red LEDs lit up the orb sockets. Now the company has announced a new Skull Crusher in steel or gold ...

No one builds a hot rod to save gas, but downgrading to bare essentials and stiffing your roommate on rent will only get you so far before it’s time to park that 10-mpg big-block. Even when gas was ...

Here is the 30-percent B&J overdrive and installation kit (no adapter is required for Turbo Hydra-matic 400 transmissions). Included in the kit is a vent canister (that must be located a minimum of 12 ...

GM’s line of Turbo-Hydramatic transmissions were some of the stoutest pieces ever fielded behind small- and big-block Chevy engines. But the TH350 and TH400 three-speed versions (and their two-speed ...

It's not a long-forgotten factory racing secret. The quickest way to move a '60s muscle car down a dragstrip faster is to equip it with a swift-shifting, close-ratio four-speed and a set of deep ...