If you are to have any success with a performance car, you need information—the more the better. Much of this information is locked away under the hood, just waiting to be let out. And a good set of ...

In the February '95 issue of HOT ROD we ran a test on the TFS Twisted Wedge small-block Chevy heads ("A New Twist On The Old Heads"). But we were unable to complete the test because the engine blew up ...